PRB Bundle Size Selection in Wireless UE
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE and NR technologies, face challenges in efficiently selecting physical resource block (PRB) bundle sizes, leading to communication errors and suboptimal channel estimation due to the lack of PRB bundling size indicators in downlink control information (DCI).
Innovation Solution
The system allows user equipment (UE) to select a PRB bundle size from a set of configurable sizes, even when the DCI does not include a bundling size indicator, by using pre-configured PRG values and default settings, enabling joint channel estimation across PRBs with the same precoding matrix for improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If PRB bundling size indicator is not included in DCI, then DCI format complexity is reduced, but channel estimation accuracy deteriorates due to inability to select optimal PRB bundle size
Solution Approach 1:
The network pre-configures multiple PRB bundling size indicator (PBSI) values and their corresponding PRB bundle sizes to the UE before data transmission. When DCI is transmitted, it includes an index pointing to the pre-configured PBSI, allowing the UE to quickly determine the appropriate PRB bundle size without adding complex formatting to DCI, thereby maintaining DCI simplicity while enabling accurate channel estimation through proper PRB bundling selection.
2Device complexity
If PRB bundle size is fixed, then device complexity is reduced, but communication efficiency deteriorates due to inability to adapt to varying channel conditions
Solution Approach 1:
The system enables dynamic PRB bundle size selection by incorporating a PRB bundling size indicator in DCI that points to pre-configured PBSI values. The network can adaptively select different PRB bundle sizes based on current channel conditions, mobility states, and traffic requirements, allowing the system to transition from static to dynamic resource allocation without significantly increasing UE complexity.
Solution Approach 2:
The invention introduces configurable parameters including multiple PBSI values, their corresponding PRB bundle sizes, and an index mechanism in DCI. These parameters allow flexible adjustment of PRB bundling configurations to match varying channel conditions, mobility scenarios, and service requirements, thereby optimizing data transmission efficiency while maintaining manageable device complexity through standardized configuration procedures.
3Adaptability or versatility
If multiple PBSI values are configured, then adaptability to different channel conditions is improved, but information overhead increases due to additional configuration data
Solution Approach 1:
Multiple PBSI values and their corresponding PRB bundle sizes are pre-configured and stored in the UE before actual data transmission begins. This preliminary configuration allows the system to support multiple PRB bundling scenarios without transmitting all configuration details repeatedly in each DCI message, thereby reducing ongoing information overhead while maintaining adaptability to different channel conditions through selective indexing of pre-stored configurations.
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a plurality of selectable physical resource block (PRB) bundle sizes. The UE may receive downlink control information (DCI) that does not include a PRB bundling size indicator that indicates a PRB bundle size to be selected from the plurality of selectable PRB bundle sizes. The UE may select a PRB bundle size, from the plurality of selectable PRB bundle sizes, despite the DCI not including the PRB bundling size indicator. Numerous other aspects are provided.