NR BWP Parameter Selection for Clear User and Cell Configuration
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Solution Overview
Problem
In NR wireless communication systems, BWP configuration is unclear due to duplication of frequency domain parameters in cell-common and user-apparatus-specific settings, leading to ambiguity in specifying the BWP operation.
Innovation Solution
A user apparatus is configured to determine parameters for BWP configuration by selectively applying either cell-common or user-specific parameters, ensuring clarity in BWP operation by ignoring or aligning user-specific parameters with cell-common parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If frequency domain parameters are duplicated in both cell-common and user-specific parameters for BWP configuration, then flexibility in parameter configuration is improved, but ambiguity in BWP operation specification occurs
Solution Approach 1:
The patent applies local quality by differentiating the scope of parameters between cell-common and user-specific configurations. Cell-common parameters (e.g., offsetToPointA, subcarrierSpacing) apply to all UEs in the cell, while user-specific parameters (e.g., offsetToCarrier, resourceBlockOffset) apply only to individual UEs. This localized application of parameters resolves ambiguity by establishing clear hierarchical rules for parameter selection.
Solution Approach 2:
The patent segments the frequency domain parameters into two distinct groups: cell-common parameters and user-specific parameters. This segmentation allows each parameter type to have its own clear definition and application scope, preventing confusion. The segmentation is implemented through separate parameter sets in the BWP configuration with explicit rules for when each set applies.
2Adaptability or versatility
If multiple BWP parameters are configured with different scopes (cell-common and user-specific), then configuration adaptability is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-defining the scope and hierarchy of parameters before BWP configuration occurs. The specification explicitly states which parameters are cell-common and which are user-specific, and establishes the rules for parameter application in advance. This preliminary structuring simplifies the configuration process by eliminating the need for complex real-time decision-making about parameter scope.
3Ease of operation
If frequency domain parameters are duplicated across different parameter scopes, then ease of configuration is improved, but reliability of BWP specification decreases
Solution Approach 1:
The patent implements feedback through clear specification rules that provide deterministic guidance for parameter selection. The standard explicitly defines the hierarchy: cell-common parameters apply when no user-specific parameter is configured, and user-specific parameters override cell-common parameters when configured. This feedback mechanism ensures reliable and consistent BWP specification across different scenarios.
Data Source
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AI summary
A user apparatus includes a reception unit configured to receive information specifying a BWP (Bandwidth part) from a base station apparatus, a control unit configured to configure the BWP by determining a parameter to be applied from a predetermined cell-common parameter and a predetermined user-apparatus-specific parameter that are included in the information specifying the BWP, and a communication unit configured to communicate with the base station apparatus by using the configured BWP, wherein the predetermined parameters are information items indicating a lowest usable subcarrier of the BWP.