DMRS Capability Signaling for UE Processing Limits in MIMO
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Solution Overview
Problem
The increased processing complexity for user equipment (UE) in decoding demodulation reference signals (DMRS) due to extended FD-OCC length from 2 to 4 exceeds the UE's processing capability, particularly in MIMO systems, leading to insufficient processing delay and capability for PDSCH demodulation.
Innovation Solution
A capability information determining method and apparatus that involves sending indication information to UE, determining processing and antenna capabilities based on this information, and optimizing time resources to ensure the UE can process DMRS within its capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the FD-OCC code length is extended from 2 to 4 to increase the quantity of orthogonal DMRS ports, then the quantity of orthogonal ports is doubled, but the processing complexity for UE exceeds its processing capability
Solution Approach 1:
The patent changes the code length parameter of FD-OCC from 2 to 4, which directly doubles the quantity of orthogonal DMRS ports that can be supported. This parameter change enables the system to support up to 24 orthogonal DMRS ports while managing UE processing complexity through associated capability indication mechanisms
Solution Approach 2:
The patent introduces dynamic capability indication mechanisms where the network device can indicate to the UE whether it should expect code length 4 DMRS. This allows the system to adapt between different DMRS configurations (code length 2 or 4) based on UE capability, making the system flexible and dynamic rather than fixed
2Quantity of substance
If the FD-OCC code length is extended from 2 to 4, then the maximum quantity of orthogonal ports for single-symbol and dual-symbol DMRS is doubled, but the processing delay becomes insufficient for PDSCH demodulation
Solution Approach 1:
The patent introduces capability indication and determination mechanisms that are performed in advance before actual DMRS processing. The network device indicates UE capability requirements, and the UE determines its capability status beforehand, allowing the system to prepare appropriate processing configurations before the actual demodulation task, thus managing processing delay expectations
Data Source
AI summary
A capability information determining method may include: A network device sends first indication information, and determines capability information of a reference signal based on the first indication information. Correspondingly, a terminal device receives the first indication information, and determines the capability information of the reference signal based on the first indication information. The first indication information indicates at least one of a code length, a type, a port number, and a time resource of the reference signal.