DMRS Port Segmentation for 5G Cooperative Communication
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving multiple data in cooperative communication systems, particularly in 5G networks, where reliable data/control signal reception is crucial for improved communication reliability.
Innovation Solution
The method involves a terminal and a base station exchanging configuration information for demodulation reference signals (DMRS), with the terminal identifying and using allocated DMRS ports for data reception, even when multiple ports are involved in different code division multiplexing groups, to enhance data transmission and reception efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple DMRS ports are allocated to a terminal for cooperative communication, then data transmission capacity is improved, but signal reception reliability deteriorates due to interference between ports in the same code division multiplexing group
Solution Approach 1:
The patent segments DMRS ports into multiple code division multiplexing groups (CDM groups), where each group uses orthogonal cover codes to separate reference signals. This segmentation allows multiple terminals to share the same time-frequency resources while maintaining signal orthogonality, thereby improving data transmission capacity without sacrificing reception reliability.
Solution Approach 2:
The patent applies local quality by assigning different orthogonal cover code patterns to different CDM groups. Each group has its own specific code structure optimized for its allocated resources, allowing the system to maintain high signal quality locally within each group while supporting multiple simultaneous transmissions across different groups.
2Productivity
If code division multiplexing is used for multiple DMRS ports, then resource utilization is improved, but measurement precision of channel state information deteriorates due to code overlap
Solution Approach 1:
The patent segments the code space into multiple orthogonal cover code groups, where each group is assigned to a specific CDM group. This segmentation prevents code overlap between different terminal equipment, allowing accurate channel state information measurement for each terminal while maintaining high resource utilization through code division multiplexing.
Solution Approach 2:
The patent introduces orthogonal cover codes as an intermediary mechanism that mediates between multiple terminals sharing the same physical resources. These codes act as separators that allow the system to maintain both high resource utilization and accurate channel measurement by preventing direct interference between multiplexed signals.
Data Source
AI summary
The disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. Methods and apparatuses for exchanging configuration information related to a demodulation reference signal (DMRS) are provided, and particularly, for providing DMRS ports included in a different code division multiplexing group for communication between a terminal and a base station.