Enhanced DMRS Port Allocation for Flexible MU PDSCH Scheduling
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Solution Overview
Problem
The restriction on multi-user (MU) scheduling due to the doubling of DMRS ports in the next-generation mobile communication system limits the utilization of increased antenna ports, constraining the scheduling capability.
Innovation Solution
A method for DMRS configuration that allows remaining orthogonal antenna ports to be associated with PDSCH transmission to another UE by using enhanced DMRS types, enabling flexible MU scheduling while minimizing implementation complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of DMRS ports is doubled in the next-generation mobile communication system, then the antenna port capacity is increased, but the MU scheduling capability is restricted due to the same scheduling restrictions as existing schemes
Solution Approach 1:
The patent changes the parameter of DMRS configuration by introducing an enhanced DMRS type with different MU scheduling restriction rules. Specifically, when the DMRS configuration is based on the enhanced DMRS type, the restriction on MU scheduling is relaxed to allow PDSCH transmission to another UE on remaining orthogonal antenna ports within the same CDM group, while still maintaining restrictions when using traditional DMRS types. This parameter change enables the system to utilize the doubled number of DMRS ports for MU scheduling without being constrained by the same restrictions as existing schemes.
2Ease of manufacture
If the same MU scheduling restrictions are applied to enhanced DMRS types as existing DMRS types, then implementation is simplified, but the utilization of increased antenna ports is limited
Solution Approach 1:
The patent introduces dynamic adaptability in MU scheduling restrictions based on the DMRS configuration type. The system can dynamically adjust the scheduling behavior: when enhanced DMRS type is configured, relaxed restrictions allow greater port utilization; when traditional DMRS type is used, existing restrictions maintain backward compatibility. This dynamic approach resolves the contradiction by allowing the system to optimize for either implementation simplicity or port utilization depending on the configuration, rather than being locked into a single restrictive mode.
Data Source
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AI summary
A method performed by a terminal according to an embodiment described in the present disclosure comprises the steps of: receiving configuration information related to a DMRS; receiving DCI for scheduling a PDSCH; receiving the DMRS for the PDSCH; and receiving the PDSCH. On the basis that the DMRS configuration is based on the enhanced DMRS type and a value indicated on the basis of an antenna port field is 2, the remaining orthogonal antenna ports based on the same CDM group are related to PDSCH transmission to another terminal in which the enhanced DMRS type is configured.