Terminal QCL Assumption for High-Frequency Coverage
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Solution Overview
Problem
In wireless communication systems using high-frequency bands, such as those above 52.6 GHz, propagation loss is significant, requiring complex area designs for beam forming with narrow beam widths to compensate for this loss.
Innovation Solution
A terminal equipped with a reception unit to receive multiple resource sets from a base station, including synchronization signals and broadcast channels, and a control unit that assumes Quasi Co-Location (QCL) identical to that of the first set when receiving the second set, allowing for a random access procedure based on the received resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If beam forming with narrow beam width is applied to compensate for propagation loss in high frequency bands, then propagation loss is reduced, but coverage area design becomes complex
Solution Approach 1:
The patent segments the coverage area into multiple beamforming regions, each with its own narrow beam characteristics. By dividing the overall coverage into manageable segments rather than attempting to cover the entire area with a single complex beamforming design, the system reduces propagation loss while managing design complexity through modular regional approaches
Solution Approach 2:
The patent introduces frequency domain resources as an additional dimension for coverage management. By allocating different frequency resources to different beamforming regions and assuming QCL relationships across frequency sets, the system extends coverage in the frequency dimension rather than solely relying on spatial beamforming complexity
2Area of stationary object
If multiple frequency resources are allocated for synchronization signals, then coverage is extended, but device complexity increases
Solution Approach 1:
The patent creates equipotential coverage by allocating multiple frequency resources for synchronization signals across different frequency sets. By ensuring that equivalent coverage potential is available across multiple frequency resources, the system extends coverage while simplifying resource management through standardized QCL assumptions that treat different frequency sets equivalently
Solution Approach 2:
The patent changes the frequency domain parameters by allocating multiple frequency resources for synchronization signals. By modifying the frequency distribution parameters and establishing QCL relationships between different frequency sets, the system extends coverage area while managing complexity through parameter-based resource organization
Data Source
AI summary
A terminal includes a reception unit that receives, from a base station, a first set including a plurality of resources that include at least a synchronization signal and optionally further include a broadcast channel and a second set including a plurality of resources that include at least a synchronization signal added to the first set in a frequency domain and optionally further include a broadcast channel, a control unit that assumes a Quasi co location (QCL) identical to a QCL assumed for the first set when receiving the second set, and a communication unit that executes a random access procedure with the base station based on information included in the resources.