Bandwidth Part Switching via DCI Field Configuration
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Solution Overview
Problem
Existing bandwidth part (BWP) switching in wireless communication systems faces issues due to inconsistencies in the size of the bandwidth part indicator field in downlink control information (DCI), leading to inefficiencies and potential misinterpretations during dynamic waveform switching (DWS) between Discrete Fourier Transform spread Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) and Cyclic prefix (CP)-OFDM waveforms.
Innovation Solution
Implementing specific conditions and rules for determining resource allocation types and transform precoder states based on the configuration of dynamic transform precoder indication (DTPI) and frequency domain resource assignment (FDRA) fields in DCI messages, ensuring accurate BWP switching by considering the enablement and bit-width comparisons of these fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the bandwidth part indicator field size is varied to match different BWP configurations, then the DCI format can be interpreted correctly for each BWP, but inconsistencies in field size lead to misinterpretations during dynamic waveform switching
Solution Approach 1:
The patent changes the parameter of the bandwidth part indicator field size dynamically based on the target BWP configuration. When switching between BWPs with different indicator field sizes, the system adjusts the field size to match the target BWP requirements, ensuring correct DCI interpretation while maintaining switching reliability through proper parameter adaptation.
2Adaptability or versatility
If dynamic waveform switching is enabled between DFT-s-OFDM and CP-OFDM, then waveform flexibility is improved, but inconsistencies in resource allocation field sizes cause misinterpretations
Solution Approach 1:
The patent applies preliminary action by determining the appropriate resource allocation field size based on the target BWP configuration before transmitting the DCI message. This ensures that the DCI format is properly prepared with the correct field sizes for the intended waveform and BWP, preventing misinterpretation during dynamic waveform switching.
3Adaptability or versatility
If the frequency domain resource assignment field bit-width is increased for larger BWPs, then resource allocation capability is improved, but DCI message size increases causing potential interpretation issues
Solution Approach 1:
The patent applies local quality by adjusting the bit-width of the frequency domain resource assignment field locally according to the specific BWP configuration. Each BWP has its own optimized field size that matches its resource allocation requirements, allowing large BWPs to have larger fields while small BWPs maintain compact structures, thus improving resource allocation capability without unnecessarily increasing overall system complexity.
Data Source
AI summary
In example embodiments of the present disclosure, an apparatus receives a downlink control information (DCI) message in a first BWP, wherein the DCI message schedules, based on a condition being met, a physical uplink shared channel transmission and indicates to perform the transmission on a second BWP, wherein the condition comprising at least one of: a dynamic transform precoder indication (DTPI) information element is configured and set to enabled for the first BWP, a DTPI information element is configured and set to enabled for the second BWP, a bit-width of a frequency domain resource assignment (FDRA) field for the first BWP is smaller than a bit-width of an FDRA field for the second BWP in the DCI message, dynamic switching is configured in a resource allocation information element for the second BWP, and/or the DCI message includes a transform precoder indicator field set to disabled.