PDSCH DMRS Mapping with Dynamic Index Selection
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Solution Overview
Problem
Existing communication systems face inefficiencies in the mapping of DMRS for PDSCH and DCI formats, leading to suboptimal resource element determination based on ambiguous index values.
Innovation Solution
The proposed solution involves a terminal and base station apparatus that determine the mapping of DMRS for PDSCH based on a first or second index, depending on the presence or absence of specific information in the DCI format, ensuring distinct possible values for these indices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single index is used to determine DMRS resource elements, then the determination process is simple, but it cannot adapt to different DCI format configurations
Solution Approach 1:
The patent implements dynamic index selection where the system transitions from a static single-index approach to a dynamic multi-index approach. The first index and second index are selectively applied based on the DCI format configuration, allowing the system to adapt its behavior to different operational conditions while maintaining a structured selection process through the antenna port indication field.
2Productivity
If DMRS mapping is optimized for specific DCI formats, then communication efficiency improves, but the system becomes more complex
Solution Approach 1:
The patent applies local quality by tailoring the DMRS resource element determination to specific DCI format requirements. Different index selection methods are applied locally based on the antenna port indication field values, allowing optimization for specific communication scenarios without requiring complete system redesign. This enables efficient, targeted optimization while maintaining overall system coherence.
Data Source
AI summary
Included are a receiver configured to receive a PDSCH and a DCI format indicating reception of the PDSCH, and further a radio resource control layer processing unit that receives a first higher layer parameter, wherein a DMRS for the PDSCH is mapped to one or multiple resource elements, the one or multiple resource elements are determined based on a first index or a second index, a possible value of the first index is not identical to a possible value of the second index, in a case that the first higher layer parameter is not configured, the one or multiple resource elements are determined based on the first index, in a case that the first higher layer parameter is configured, the one or multiple resource elements are determined based on the second index, and the first higher layer parameter is related to a maximum number of DMRS ports for the DMRS.