Bandwidth Part Width Switching for Higher UE Transmit Power
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Solution Overview
Problem
Devices operating in wireless communications systems face limitations such as reduced transmit power and increased interference due to narrow bandwidth part (BWP) configurations, which can be exacerbated by power spectral density (PSD) thresholds, particularly in the 6 GHz spectrum.
Innovation Solution
A user equipment (UE) receives an indication from a base station to switch from a default, narrow BWP to a wider BWP, allowing for increased transmit power and reduced interference by aligning center frequencies and using a scaling factor to determine the new BWP width, which can be communicated via system information blocks or master information blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a narrow bandwidth part (BWP) configuration is used, then device resource limitations are managed, but transmit power is reduced and interference increases
Solution Approach 1:
The system dynamically switches between different BWP configurations (first BWP and second BWP) based on communication needs. The UE can transition from a narrow first BWP to a wider second BWP when higher transmit power is required, and switch back when resource conservation is prioritized. This dynamic adaptation resolves the contradiction by allowing the system to optimize between transmit power and resource usage in real-time.
Solution Approach 2:
The patent changes the bandwidth parameter of the BWP configuration. By switching from a narrow first BWP to a wider second BWP, the system increases the available bandwidth for transmission, which directly increases transmit power capability and reduces interference through better spectral utilization. The parameter change enables the system to overcome the limitations of narrowband operation.
2Power
If a wider BWP is used to increase transmit power, then communication performance improves, but device resource limitations are exceeded
Solution Approach 1:
The system employs dynamic BWP switching that allows transition between narrow first BWP and wider second BWP based on current communication requirements. When high transmit power is needed, the UE switches to the second BWP; when resource conservation is prioritized, it switches back to the first BWP. This dynamic approach enables the system to access wider bandwidth resources only when necessary, avoiding permanent resource overcommitment.
Solution Approach 2:
The system pre-configures multiple BWP options (first BWP and second BWP) with different bandwidth characteristics before actual communication begins. The UE and base station have these configurations ready, allowing rapid switching without real-time negotiation overhead. This preliminary preparation enables the system to quickly adapt to changing power requirements while managing resource constraints efficiently.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) in communication with a base station may support updating a bandwidth part (BWP) width from a default configuration. The UE may identify a first BWP, where the first BWP is a default BWP for communication with the base station. The UE may receive an indication of a second BWP from the base station that is wider than the first BWP. The indication may, in some cases, be included in a remaining minimum system information (RMSI), a master information block (MIB), or the like. The UE may select, based on the received indication and an operating band of the base station, the second BWP for communications between the UE and the base station. The UE and the base station may communicate using the second BWP.