Dynamic Resource Block Bundling for Subband Full Duplex Precoding
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Solution Overview
Problem
Conventional wireless communication systems face limitations in scheduling downlink transmissions during subband full duplex (SBFD) slots, particularly in determining resource block counts for precoding, which can lead to misunderstandings between user equipment (UE) and network entities regarding precoding techniques.
Innovation Solution
The implementation of dynamic resource block bundling, where user equipment (UE) receives indications of first and second precoding bundle size sets, including narrowband and wideband values, to accurately identify resource block bundling based on granted scheduling, ensuring contiguous frequency resource allocation and precise precoding application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional resource block scheduling is used in SBFD slots, then scheduling simplicity is maintained, but precoding accuracy and resource block determination reliability deteriorate
Solution Approach 1:
The patent segments the frequency spectrum into multiple subbands within SBFD slots, allowing independent resource block bundling configuration for each subband. This segmentation enables precise precoding assumption alignment in each subband while maintaining overall scheduling manageability through hierarchical configuration structures.
Solution Approach 2:
The patent introduces dynamic resource block bundling configurations that can be adjusted per subband and per transmission scenario. The bundling size and type (contiguous or non-contiguous) are dynamically determined based on channel conditions, traffic requirements, and SBFD slot characteristics, enabling adaptive precoding optimization.
2Measurement precision
If wideband precoding is applied across all frequency resources, then precoding overhead is reduced, but resource block identification precision and transmission accuracy deteriorate
Solution Approach 1:
The patent divides the frequency spectrum into subbands and applies resource block bundling within each subband rather than across the entire bandwidth. This segmentation enables precise resource block identification within subbands while reducing precoding information overhead compared to narrowband per-resource-block approaches.
Solution Approach 2:
The patent changes the bundling parameter scope from system-wide wideband to subband-specific, allowing flexible adjustment of bundling size and type per subband. This parameter change enables optimization of the trade-off between identification precision and information overhead for different frequency regions.
3Productivity
If dynamic resource block bundling with multiple bundle size sets is implemented, then downlink transmission scheduling accuracy is improved, but UE processing complexity and signaling overhead increase
Solution Approach 1:
The patent implements dynamic selection between multiple precoding bundle size sets (first set with narrowband values, second set with wideband values) based on scheduling requirements. The UE processes only the relevant bundle size set indicated by the network, reducing actual processing complexity while maintaining scheduling flexibility and efficiency.
Solution Approach 2:
The patent changes the bundling size parameter dynamically through network indication, allowing the UE to switch between different bundle size sets as needed. This parameter change mechanism enables efficient scheduling adaptation without requiring the UE to maintain complex processing for all possible configurations simultaneously.
4Stability of the object's composition
If contiguous frequency resource allocation is enforced, then precoding continuity is improved, but resource allocation flexibility and spectrum utilization deteriorate
Solution Approach 1:
The patent segments frequency resources into subbands and applies contiguous bundling within each subband while allowing non-contiguous allocation across subbands. This segmentation approach maintains precoding continuity within subbands while providing flexibility in cross-subband resource allocation through selective subband assignment.
Solution Approach 2:
The patent applies different bundling continuity requirements to different subbands based on local channel conditions and service requirements. Some subbands may use contiguous bundling for stability-critical services, while others may allow non-contiguous allocation for flexibility-critical services, optimizing the trade-off locally in each subband.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive an indication of dynamic resource block (RB) bundling for downlink transmissions, the dynamic RB bundling associated with a first precoding bundle size set and a second precoding bundle size set. The UE may receive a grant scheduling a downlink transmission associated with a subband full duplex slot, the grant comprising a bundling size indication identifying either the first precoding bundle size set or the second precoding bundle size set. The UE may receive the downlink transmission associated with the subband full duplex slot according to the grant, the downlink transmission received via contiguous frequency resources associated with RB bundling and identified based at least in part on an RB size identified by the bundling size indication, wherein the RB size comprises a narrowband bundle size value, a wideband bundle size value, or a combination thereof.