Dynamic Uplink Bandwidth Part Scheduling via DCI Signaling
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Solution Overview
Problem
Current wireless communication systems face limitations in flexibility and efficiency for controlling downlink and uplink transmissions, particularly in configuring periodicities and subcarrier spacings for uplink bandwidth parts, which hampers the efficient use of time, frequency, and space resources.
Innovation Solution
The implementation of systems and methods that allow user equipment (UE) and base stations to receive and transmit radio resource control messages configuring multiple periodicities and subcarrier spacings for uplink bandwidth parts, enabling dynamic scheduling of physical uplink shared channels through physical downlink control channels, thereby optimizing downlink and uplink transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed communication structure is used for downlink and uplink transmissions, then system simplicity is maintained, but flexibility and efficiency of resource utilization are limited
Solution Approach 1:
The patent implements dynamic switching between different uplink bandwidth parts (BWPs) based on scheduling requirements. The UE can be configured with multiple BWPs having different periodicities and subcarrier spacings, and can dynamically switch between them via DCI signaling, transforming the static communication structure into a dynamic one that adapts to varying transmission needs.
Solution Approach 2:
The patent changes key communication parameters including periodicity values (e.g., 0.5ms, 1ms, 2ms, 4ms, 8ms, 16ms, 32ms, 64ms) and subcarrier spacings (e.g., 15kHz, 30kHz, 60kHz, 120kHz) for different BWPs. This allows the system to optimize transmission efficiency by selecting appropriate parameter combinations for different service requirements without fundamentally changing the communication structure.
2Productivity
If multiple periodicities and subcarrier spacings are configured for uplink bandwidth parts, then resource utilization efficiency is improved, but signaling complexity and configuration overhead increase
Solution Approach 1:
The patent pre-configures multiple uplink BWPs with different periodicities and subcarrier spacings through RRC signaling before actual transmissions. This preliminary configuration allows the UE to have multiple ready-to-use bandwidth parts, enabling rapid switching without real-time negotiation, thus improving resource utilization while managing signaling complexity through advance preparation.
Solution Approach 2:
The patent introduces DCI (Downlink Control Information) as an intermediary mechanism to manage the switching between different BWP configurations. The DCI contains BWP indicator fields that trigger UE to switch between pre-configured BWPs, providing a streamlined control mechanism that reduces the complexity of managing multiple periodicities and subcarrier spacings.
3Productivity
If dynamic scheduling of physical uplink shared channels is implemented, then transmission efficiency is enhanced, but processing complexity at base station and user equipment increases
Solution Approach 1:
The patent segments the uplink transmission resources into multiple bandwidth parts, each with specific periodicities and subcarrier spacings tailored to different service requirements. This segmentation allows independent optimization of each BWP for specific transmission scenarios, improving overall transmission efficiency while distributing processing complexity across multiple manageable configurations rather than handling all transmissions uniformly.
Data Source
AI summary
A user equipment (UE) is described. Receiving circuitry is configured to receive a radio resource control (RRC) message including information used for configuring more than one periodicities, each of the more than one periodicities corresponding to each of more than one uplink bandwidth parts (UL BWPs). The receiving circuitry is also configured to receive on a physical downlink control channel (PDCCH), a downlink control information format used for scheduling of a physical uplink shared channel (PUSCH), the downlink control information format being used for activating one UL BWP among the more than one UL BWPs. Transmitting circuitry is configured to perform, based on a periodicity among the more than one periodicities, an uplink transmission on the PUSCH in the activated one UL BWP. The periodicity among the more than one periodicities is determined based on the activated one UL BWP in which the uplink transmission is performed on the PUSCH.