Resource Segmentation for URLLC Interference Reduction
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Solution Overview
Problem
In wireless communication systems, particularly in LTE and NR systems, coordinated multi-node sending causes data interference, making it challenging to ensure both reliability and low latency, especially in ultra-reliable low-latency communication (URLLC) scenarios where 99.999% reliability and 1 ms latency are required.
Innovation Solution
A data sending method that configures a resource set for sending data, where some resources are determined and used for mapping data, reducing interference between nodes by using a proper subset of resources for each node, and employing techniques like rate matching, redundancy versioning, and power control to optimize symbol mapping and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coordinated multi-node sending is used to improve data transmission reliability, then reliability is improved, but data interference between nodes increases causing latency to worsen
Solution Approach 1:
The patent segments the resource set into multiple disjoint subsets, with each sending node assigned a unique subset for data transmission. This segmentation prevents different nodes from using the same resources simultaneously, thereby eliminating inter-node interference while maintaining the reliability benefits of coordinated multi-node sending.
Solution Approach 2:
Each sending node is assigned a specific local resource subset that is optimized for that node's transmission characteristics. This local quality assignment ensures that each node operates on resources tailored to its specific channel conditions and requirements, improving overall system reliability without causing interference to other nodes.
2Productivity
If all resources in the resource set are used for data sending, then productivity is improved, but interference between multiple nodes increases
Solution Approach 1:
The resource set is divided into multiple disjoint subsets assigned to different sending nodes. This segmentation allows each node to use its assigned resources without interference from other nodes, maintaining high productivity while eliminating harmful interference through proper resource partitioning.
Solution Approach 2:
The patent introduces a new dimension of resource allocation by assigning different resource subsets to different nodes. This dimensional separation in the resource space allows multiple nodes to transmit simultaneously without interference, effectively increasing system productivity while avoiding the harmful effects of resource contention.
Data Source
AI summary
A data sending method includes: performing, by a first node, rate matching to determine a first bit sequence; determining, by the first node, a first symbol sequence based on the first bit sequence, and determining some to-be-mapped symbols in the first symbol sequence; and mapping, by the first node, the symbols to a first resource, and sending the symbols.