DM-RS Port Mapping for Flexible Wireless Resource Allocation
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Solution Overview
Problem
Current wireless systems face limitations in supporting flexible codeword to layer mapping and quasi co-located demodulation reference signal (DM-RS) port allocation, leading to inefficient resource utilization and potential interference due to fixed allocation rules and lack of adaptability in next-generation wireless communication standards.
Innovation Solution
The proposed solution involves a method for flexible mapping of DM-RS ports to transmission layers using a pre-defined table with adaptive bit-width signaling, allowing for quasi co-located antenna ports and dynamic allocation based on transmission rank, enabling more efficient resource utilization and interference reduction by grouping DM-RS ports according to specific rules and signaling messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fixed allocation rules are used for DM-RS ports, then device complexity is reduced and ease of operation is improved, but adaptability and resource utilization efficiency deteriorate
Solution Approach 1:
The patent implements dynamic DM-RS port allocation where the mapping between codewords and layers is not fixed but can be changed based on transmission conditions. The network node determines the mapping dynamically, allowing the system to adapt to different channel conditions, traffic types, and interference scenarios while maintaining operational simplicity through automated decision-making algorithms.
Solution Approach 2:
The system changes the mapping parameters between codewords and layers based on transmission rank and channel conditions. By varying the allocation parameters dynamically rather than using fixed rules, the system achieves both adaptability to different scenarios and maintains ease of operation through standardized parameter adjustment mechanisms.
2Adaptability or versatility
If flexible mapping of DM-RS ports is implemented, then adaptability and resource utilization are improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent segments the DM-RS port allocation into different groups based on transmission rank. By dividing the allocation space into manageable segments corresponding to different rank values, the system achieves flexibility in mapping while reducing the complexity of managing all possible allocations simultaneously. Each segment can be handled independently with simplified rules.
Solution Approach 2:
The system performs preliminary grouping of DM-RS ports according to transmission rank before actual allocation. This preliminary organization simplifies the subsequent mapping process by pre-establishing valid combinations, reducing the computational complexity during real-time operation while maintaining adaptability to different rank requirements.
3Productivity
If adaptive bit-width signaling is used, then resource utilization efficiency is improved, but measurement precision and configuration complexity increase
Solution Approach 1:
The patent employs variable bit-width signaling where the number of bits used to indicate DM-RS port mapping depends on the transmission rank. This parameter change allows efficient use of signaling resources by using fewer bits for lower ranks and more bits for higher ranks, achieving optimal resource utilization while maintaining precise indication through adaptive precision matching the actual transmission requirements.
Data Source
AI summary
In an exemplary embodiment, a wireless communication method is disclosed for indicating a mapping between a set of reference signals and data streams so that a reference signal can be transmitted by one or more of multiple network nodes based on the mapping. The disclosed embodiments provide mapping and additional rules.