Dual-CDM DMRS Transmission for Multi-TRP Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently utilizing demodulation reference signals (DMRS) from multiple transmission reception points (TRPs) for enhanced transmission reliability and robustness, particularly in high mobility scenarios.
Innovation Solution
The implementation of DMRS from two code division multiplexing groups, where each group has an equal number of demodulation reference signal ports and distinct transmission configuration indicators, allowing for simultaneous transmission and reception of information from multiple TRPs, enhancing spatial diversity and robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DMRS from multiple TRPs are used for enhanced transmission reliability, then transmission reliability improves, but system complexity increases due to multiple code division multiplexing groups
Solution Approach 1:
The patent divides the DMRS ports into two distinct code division multiplexing groups, where each group is associated with a different TRP. This segmentation allows the system to manage multiple TRPs independently through separate CDM groups, resolving the complexity issue while maintaining reliability benefits from multi-TRP transmission.
Solution Approach 2:
The patent introduces a new dimension of organization by creating separate code division multiplexing groups for different TRPs. This dimensional separation in the signal structure allows the receiver to distinguish and process signals from multiple TRPs independently, enabling reliable multi-TRP operation without proportionally increasing processing complexity.
2Reliability
If DMRS ports from different TRPs are transmitted simultaneously, then spatial diversity improves, but signal strength requirements become more stringent
Solution Approach 1:
The patent assigns different local qualities to DMRS ports from different TRPs by using separate code division multiplexing groups. Each CDM group can be optimized independently for its associated TRP's signal characteristics, allowing the system to achieve spatial diversity while accommodating variations in signal strength without requiring all signals to meet identical strength requirements.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for transmission using DMRS from two code division multiplexing groups. One method (500) includes transmitting (502) information on a physical downlink shared channel to a user equipment, wherein: the information on the physical downlink shared channel is transmitted by: first demodulation reference signal ports of a first code division multiplexing group having a first number of demodulation reference signal ports; and second demodulation reference signal ports of a second code division multiplexing group having a second number of demodulation reference signal ports, wherein the first code division multiplexing group is different from the second code division multiplexing group, and the first number of demodulation reference signal ports is the same as the second number of demodulation reference signal ports.