Dynamic DMRS Type Switching for Diverse Wireless Services
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently supporting diverse services and requirements, such as enhanced mobile broadband, ultra-reliable low-latency communications, and massive machine-type communications, due to limitations in demodulation reference signal (DMRS) types, which affect data transmission and reception efficiency.
Innovation Solution
A method and apparatus for dynamically switching between existing and enhanced DMRS types in a wireless communication system, using radio resource control (RRC) and medium access control-control element (MAC-CE) signaling to activate the enhanced DMRS for improved data transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing DMRS types are used, then device complexity is reduced and ease of operation is maintained, but data transmission and reception efficiency is insufficient for diverse services
Solution Approach 1:
The patent implements dynamic switching between existing DMRS types (Type 1 and Type 2) and enhanced DMRS types through MAC-CE signaling. This allows the system to adapt DMRS configuration in real-time based on service requirements, transforming the static DMRS selection into a dynamic process that optimizes transmission efficiency without permanently increasing system complexity
Solution Approach 2:
The patent changes the parameters of DMRS by introducing enhanced DMRS types with modified properties (different antenna port configurations, scrambling identities, and resource element patterns). These parameter variations enable the system to support diverse services including eMBB, URLLC, and mMTC while maintaining backward compatibility with existing devices
2Adaptability or versatility
If enhanced DMRS types are activated, then service performance and flexibility are improved, but signaling overhead and system complexity increase
Solution Approach 1:
The patent segments the DMRS configuration process into two distinct parts: RRC signaling for initial configuration of available DMRS types, and MAC-CE signaling for dynamic activation/selection of specific types. This segmentation allows the system to support multiple services with different DMRS requirements while keeping the switching mechanism manageable through hierarchical control
Solution Approach 2:
The patent introduces MAC-CE signaling as an intermediary layer between RRC configuration and actual DMRS transmission. This intermediary enables flexible activation of enhanced DMRS types without requiring complex reconfiguration of the entire system, as MAC-CE provides a lightweight mechanism for dynamic selection
3Productivity
If dynamic switching between DMRS types is implemented, then transmission efficiency is improved, but processing time and complexity increase
Solution Approach 1:
The patent performs preliminary configuration of enhanced DMRS types through RRC signaling before actual transmission begins. This preliminary action ensures that all necessary parameters and configurations are prepared in advance, allowing rapid switching via MAC-CE without significant processing delays during actual data transmission
Data Source
AI summary
A method performed by a terminal in a wireless communication system is provided. The method includes receiving, from a base station, first information indicating at least one DMRS type, via an RRC signaling, receiving, from the base station, second information indicating whether to activate an enhanced DMRS type corresponding to the at least one DMRS type, via a MAC-CE signaling, and in case that the second information indicates activation of the enhanced DMRS type, receiving, from the base station, a PDSCH or transmitting, to the base station, a PUSCH based on the enhanced DMRS type.