Adaptive Bandwidth Part Switching for Reduced Delay
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Solution Overview
Problem
Current bandwidth part (BWP) switching in wireless communication systems involves significant delays, especially when changes include specific parameters like central frequency, cyclic prefix, and subcarrier spacing, which can lead to inefficient energy consumption and prolonged data transmission monitoring times.
Innovation Solution
A method and apparatus that allow user equipment (UE) to switch to a new BWP configuration after either a first predefined switching delay when specific parameters are changed, or a shorter second predefined switching delay when these parameters are not changed, enabling earlier data transmission monitoring and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a first predefined switching delay is used when BWP configuration parameters (central frequency, cyclic prefix, subcarrier spacing) are changed, then the switching reliability is improved, but the switching time increases and energy consumption increases
Solution Approach 1:
The patent applies dynamics by making the switching delay adaptive rather than fixed. The UE determines the appropriate switching delay (first or second predefined delay) based on whether specific BWP configuration parameters need to be changed. This dynamic adjustment allows the system to optimize between reliability and time loss by selecting the appropriate delay based on the actual configuration change requirements.
Solution Approach 2:
The patent changes the parameter of switching delay based on the configuration parameters being modified. When central frequency, cyclic prefix, or subcarrier spacing parameters are changed, the first predefined switching delay is applied to ensure reliable RF retuning. When these parameters are not changed, the second predefined switching delay (which is shorter) is applied. This parameter-based differentiation resolves the contradiction by matching the delay to the actual change requirements.
2Reliability
If a first predefined switching delay is used when BWP configuration parameters are changed, then the switching reliability is improved, but the energy consumption increases
Solution Approach 1:
The patent makes energy consumption dynamic by adjusting the switching delay based on the actual configuration parameters being changed. The UE evaluates whether central frequency, cyclic prefix, or subcarrier spacing parameters are modified and selects the appropriate delay accordingly. This prevents unnecessary long delays when full RF retuning is not required, thereby reducing energy consumption while maintaining reliability when needed.
Solution Approach 2:
The patent changes the switching delay parameter based on the specific BWP configuration parameters that are being modified. By linking the delay selection to the actual parameter changes (central frequency, cyclic prefix, subcarrier spacing), the system avoids applying the longer first delay when it is not necessary, thus reducing energy consumption while preserving reliability for cases that require it.
3Loss of time
If a second predefined switching delay is used when BWP configuration parameters are not changed, then the switching time is reduced, but the switching reliability may be compromised
Solution Approach 1:
The patent applies parameter-based differentiation where the switching delay (first or second predefined delay) is selected based on whether specific BWP configuration parameters (central frequency, cyclic prefix, subcarrier spacing) are changed. This ensures that the shorter second delay is only used when it is safe to do so (when these parameters are not changed), while the first delay is used when reliability requires it, thus resolving the contradiction between time reduction and reliability maintenance.
4Adaptability or versatility
If BWP switching is performed frequently to adapt to different service requirements, then the system adaptability is improved, but the energy consumption increases due to prolonged monitoring times
Solution Approach 1:
The patent introduces dynamics into the BWP switching process by making the switching delay adaptive based on the specific configuration parameters being changed. This allows the system to frequently switch BWPs for adaptability while consuming less energy, because the UE can use the shorter second predefined delay when full parameter changes are not required, thereby reducing the monitoring time and associated energy consumption while maintaining system adaptability.
Data Source
AI summary
Aspects of the disclosure provide a method and an apparatus for performing a bandwidth part (BWP) switching process within different switching delays. For example, the apparatus can include receiving circuitry and processing circuitry. The receiving circuitry can receive from a BS a signaling indicating a change to a BWP configuration of the UE. The processing circuitry can perform a BWP configuration switching process based on the change to the BWP configuration to switch an active BWP configuration to a new BWP configuration, and monitor data transmission from the BS with the new BWP configuration either after a first predefined switching delay when the change to the BWP configuration includes at least one of a predefined set of BWP configuration parameters or after a second predefined switching delay when the change to the BWP configuration does not include any one of the predefined set of BWP configuration parameters.