Downlink Signal Reception Using Non-Serving Cell QCL References
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing explosive data traffic, high transmission rates, and efficient resource utilization due to limitations in channel state information measurement and handover procedures, particularly when considering resources from non-serving cells.
Innovation Solution
The method and apparatus extend the resources for channel state information measurement and signal transmission to include non-serving cells by utilizing quasi co-location (QCL) relations, allowing for more efficient resource selection and reducing the need for higher-layer measurements and handover procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If channel state information measurement is limited to serving cell resources only, then measurement complexity is reduced, but resource selection suitability and channel state information accuracy deteriorate
Solution Approach 1:
The patent applies universality by enabling reference signals from non-serving cells to serve dual purposes: they continue to function for traditional handover measurements while simultaneously being utilized for channel state information measurement and beam management. This multi-functional use of reference signals allows the system to access more measurement resources without proportionally increasing complexity, as the same signal structures serve multiple measurement objectives.
Solution Approach 2:
The patent introduces QCL (Quasi-Co-Location) relationship indicators as an intermediary mechanism that mediates between non-serving cell reference signals and the terminal's channel estimation process. The QCL indicators provide a structured way for the network to guide terminals on how to utilize non-serving cell signals for channel state information, managing the complexity through standardized relationship definitions rather than requiring complex ad-hoc measurement configurations.
2Reliability
If higher-layer measurement and handover procedures are performed for resource selection, then reliability is improved, but time consumption increases
Solution Approach 1:
The patent applies preliminary action by performing channel state information measurement using non-serving cell resources in advance, before handover or resource selection decisions are made. Terminals can pre-measure and report channel conditions of neighboring cells, allowing the network to make faster resource allocation decisions without waiting for traditional handover measurement completions. This pre-measurement capability reduces the time required for resource selection while maintaining reliability through accurate channel state information.
Solution Approach 2:
The patent introduces dynamic resource selection capability where terminals can adaptively choose to measure and report channel state information of non-serving cells based on current network conditions and service requirements. The system dynamically adjusts measurement configurations and resource allocation decisions, allowing faster resource selection when conditions permit while maintaining reliability when conditions require more conservative approaches.
3Productivity
If non-serving cell resources are excluded from channel state information measurement, then system complexity is reduced, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent enables non-serving cell reference signals to serve multiple functions simultaneously: traditional handover measurements, channel state information measurement, beam management, and interference measurement. This multi-functional utilization maximizes the value extracted from existing network resources without requiring additional dedicated resources, thereby improving resource utilization efficiency while avoiding proportional increases in system complexity.
Solution Approach 2:
The patent utilizes parameter changes by adjusting measurement configuration parameters such as QCL relationship indicators, measurement bandwidths, and reporting configurations to optimize the use of non-serving cell resources. Through parameter optimization, the system achieves efficient resource utilization by configuring measurements to match actual channel conditions and service requirements, extracting maximum value from available resources without unnecessary complexity.
Data Source
AI summary
A method and an apparatus for transmitting/receiving a signal in a wireless communication system are disclosed. A method for receiving a downlink signal according to one embodiment of the present disclosure, may comprise steps of: receiving transmission configuration indicator (TCI) state information of a downlink signal from a base station, the TCI state information including quasi co-location (QCL) information for configuring QCL relation between the downlink signal and a reference signal; and receiving the downlink signal based on the TCI state information from the base station. The reference signal for the downlink signal may be configured based on a non-serving cell other than a serving cell of the terminal, a signal of a non-serving cell, measurement object information for radio resource management (RRM) measurement configured by the QCL information.