Dynamic Spectrum Sharing Spatial Division Multiplexing Interference Management
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing dynamic spectrum sharing across different radio access technologies, particularly in optimizing resource allocation and interference measurement for enhanced spectral efficiency.
Innovation Solution
Implementing spatial division multiplexing (SDM) configurations that allow base stations to communicate with multiple UEs using different radio access technologies (RATs) by indicating specific resource sets, interference measurement resources, and rate matching resources, enabling efficient dynamic spectrum sharing (DSS) communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic spectrum sharing is implemented across multiple radio access technologies, then spectral efficiency is improved, but interference management complexity increases
Solution Approach 1:
The patent segments the spectrum into different resource sets (first resource set for first RAT, second resource set for second RAT) and applies separate interference measurement resources and rate matching configurations for each segment. This allows independent management of interference characteristics for different RATs while maintaining overall spectral efficiency.
Solution Approach 2:
The patent changes key parameters including resource allocation patterns, interference measurement configurations, and rate matching parameters dynamically based on the active RAT and traffic conditions. This enables adaptive optimization of spectral efficiency while managing interference complexity through parameter adjustment rather than structural complexity.
2Productivity
If spatial division multiplexing is used for multiple UEs with different RATs, then resource allocation efficiency is improved, but measurement precision requirements increase
Solution Approach 1:
The patent creates separate interference measurement resource sets for different RATs within the SDM framework. Each UE receives interference measurement resources specific to its RAT, allowing precise measurement of interference from other RATs without cross-contamination. This segmentation enables accurate interference measurement while maintaining efficient multi-RAT resource allocation.
Solution Approach 2:
The patent introduces reference signals as intermediary elements that facilitate interference measurement between different RATs. These reference signals are transmitted in controlled resource elements and serve as mediators for measuring inter-RAT interference, enabling precise measurement without direct UE-to-UE interference assessment.
3Reliability
If rate matching is applied for interference management, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies rate matching in advance during resource allocation, where the base station pre-determines the rate matching pattern based on configured resource sets and interference measurement results. This preliminary rate matching ensures reliable communication by pre-accounting for interference from other RATs, eliminating the need for complex real-time rate adaptation at the UE.
Solution Approach 2:
The patent configures UEs with self-service rate matching capabilities where UEs autonomously apply rate matching patterns based on pre-configured resource set information and interference measurement results. This reduces base station processing complexity while maintaining communication reliability through UE-side rate matching execution.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A base station to communicate with a set of user equipments (UEs) in a spatial division multiplexing (SDM) configuration for dynamic spectrum sharing (DSS) communications. One or more first UEs of the set of UEs may communicate via a first radio access technology (RAT), and one or more second UEs may communicate via a second RAT in a multiple-user multiple-input multiple output (MU-MIMO) configuration. The base station may indicate the SDM configuration to one or more of the set of UEs. In some examples, the base station may transmit an indication to the set of UEs which may indicate a set of resources to be used for DSS communications. In some examples, the SDM configuration may specify one or more reference signal patterns for communicating in the set of resources.