PDSCH Rate Matching for Inter-Cell Multi-TRP Wireless Systems
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Solution Overview
Problem
In Release 17 of 3GPP, the enhancement of multi-DCI operation for inter-cell, multi-TRP operation poses challenges in PDSCH rate matching due to different synchronization signal block (SSB) patterns in various cells, which affects the efficient allocation of physical resource blocks (PRBs).
Innovation Solution
The proposed solution enhances PDSCH rate matching by associating physical cell identifiers (IDs) with control resource set (CORESET) pool indices, enabling control signaling for SSB patterns in different cells, and optimizing rate matching behavior for PDSCH transmissions across cells with distinct SSB patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDSCH rate matching is performed in inter-cell multi-TRP operation with different SSB patterns, then the reliability of wireless communication is improved, but the device complexity increases due to the need to manage and differentiate multiple SSB patterns across cells
Solution Approach 1:
The patent segments the rate matching process by introducing separate rate matching patterns for different cells, each associated with specific SSB patterns. This allows the system to handle multiple SSB patterns independently rather than as a unified complex structure, resolving the contradiction by dividing the management complexity into cell-specific segments while maintaining reliable PDSCH rate matching across inter-cell multi-TRP operations
Solution Approach 2:
The patent applies preliminary action by configuring rate matching patterns and SSB pattern associations in advance through higher-layer signaling before PDSCH transmission. This pre-configuration approach allows the UE to prepare for handling different SSB patterns without real-time complexity, improving reliability through proactive setup while reducing operational device complexity
2Manufacturing precision
If control signaling for SSB patterns is introduced for different cells, then the manufacturing precision of resource allocation is improved, but the loss of information increases due to additional signaling overhead
Solution Approach 1:
The patent applies local quality by providing cell-specific rate matching pattern configurations and SSB pattern associations only where needed for each cell, rather than universal signaling for all cells. This targeted approach improves resource allocation precision for each cell's specific SSB pattern requirements while minimizing overall signaling overhead by avoiding redundant information transmission
Solution Approach 2:
The patent utilizes parameter changes by dynamically configuring rate matching pattern parameters and SSB pattern associations through higher-layer signaling based on specific cell conditions. This allows the system to adapt resource allocation precision to actual network requirements while controlling signaling overhead through selective parameter configuration rather than fixed comprehensive signaling
Data Source
AI summary
The present application relates to devices and components including apparatus, systems, and methods to provide rate matching for inter-cell, multiple transmit-receive point operation in wireless communication systems.