BWP Selection in User Equipment via RRC Parameters
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Solution Overview
Problem
In wireless communication systems using NR, there is a challenge in appropriately selecting a Bandwidth Part (BWP) for initial access when the parameter for specifying the BWP is not configured during Radio Resource Control (RRC) configuration.
Innovation Solution
A user equipment is designed with a receiving unit to receive information designating a BWP from a base station, a control unit to configure the BWP based on dedicated parameters, and a communication unit to use the activated BWP, even when only the initial BWP is configured, ensuring appropriate BWP selection for Special Cells and Secondary Cells during RRC or MAC layer activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only the initial BWP is configured during RRC configuration, then the configuration complexity is reduced, but the ability to appropriately select and activate a specific BWP is lost
Solution Approach 1:
The patent applies preliminary action by pre-configuring a default BWP index in the RRC configuration parameters before actual BWP activation is needed. This allows the system to automatically select the first activated BWP without requiring complex real-time selection logic, thus reducing configuration complexity while maintaining BWP selection capability.
Solution Approach 2:
The system implements self-service by enabling the user equipment to autonomously determine and activate the first BWP based on pre-configured default index information stored in the RRC parameters. This eliminates the need for additional signaling or complex control mechanisms, allowing the device to self-configure appropriate BWPs while maintaining adaptability.
2Adaptability or versatility
If a parameter for specifying the first activated BWP is always configured, then BWP selection capability is ensured, but the configuration becomes more complex and unnecessary when only initial BWP is used
Solution Approach 1:
The patent applies local quality by making the default BWP index configuration optional and context-dependent. The parameter is only activated and utilized when multiple BWPs are configured, while remaining inactive or defaulting to simple initial BWP configuration when only a single BWP is used. This localized application of complexity ensures BWP selection capability where needed without adding unnecessary configuration burden elsewhere.
Data Source
AI summary
A user equipment includes a receiving unit configured to receive, from a base station apparatus, information designating a Bandwidth Part (BWP) of a cell, a control unit configured to configure a BWP to be activated, based on a parameter dedicated to the user equipment included in the information, when: the cell is a Special Cell (SpCell) and a configuration by a Radio Resource Control (RRC) is executed; or the cell is a Secondary Cell (SCell) and a Media Access Control (MAC) layer is activated, and a communication unit configured to communicate with the base station apparatus by using the BWP to be activated, wherein the parameter is configured in information for designating the BWP of the cell, irrespective of the number of BWPs configured for the cell.