FQAM Resource Allocation for 5G Interference Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G wireless communication systems, existing technologies face challenges in optimizing resource utilization efficiency due to varying channel conditions among users, leading to suboptimal transmission rates and interference between users with different modulation schemes.
Innovation Solution
The method involves using inactive resource units, such as subcarriers, to transmit modulation symbols to different users with varying power levels, specifically employing frequency-quadrature amplitude modulation (FQAM) and quadrature amplitude modulation (QAM) to improve resource allocation and signal separation in a 5G system, allowing for better performance at the cell edge and increased throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If different modulation schemes are adapted to different users based on channel conditions, then transmission rates are improved, but interference between users increases
Solution Approach 1:
The resource units (subcarriers) are segmented into active and inactive sets. Active resource units are used for FQAM transmission to users requiring higher data rates, while inactive resource units are allocated to other users using conventional QAM. This segmentation allows different modulation schemes to operate on disjoint frequency resources, improving individual transmission rates while eliminating inter-user interference through orthogonal resource allocation.
2Reliability
If active resource units are allocated to one user, then transmission performance for that user is improved, but resource utilization efficiency decreases
Solution Approach 1:
Resource units are designed with multi-functionality: they can serve as active resource units for FQAM transmission when high data rates are required, or as inactive resource units for conventional QAM transmission when lower rates suffice. This universal design allows the same physical resources to be dynamically repurposed based on user needs, maximizing both transmission performance for individual users and overall resource utilization efficiency across the system.
Solution Approach 2:
The system dynamically changes the operational parameters of resource units by switching between active and inactive states. When a user experiences good channel conditions, resource units are activated for FQAM to maximize transmission rate. When channel conditions deteriorate or lower rates suffice, the same resource units are deactivated for FQAM and reallocated to other users via conventional QAM, thereby optimizing overall resource utilization while maintaining adequate transmission performance.
3Device complexity
If conventional QAM is used for all users, then system complexity is reduced, but spectral efficiency decreases
Solution Approach 1:
Instead of applying a uniform modulation scheme system-wide, the patent applies different modulation qualities locally to different resource units and users. Users with poor channel conditions or requiring lower data rates receive conventional QAM on inactive resource units, maintaining simplicity. Users with good channel conditions requiring higher rates receive FQAM on active resource units, boosting spectral efficiency. This localized differentiation optimizes spectral efficiency without imposing excessive complexity on the entire system.
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates of Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). A method for operating a base station in a wireless communication system includes transmitting, to a first terminal, a frequency-quadrature amplitude modulation (FQAM) symbol through a plurality resource units that comprises an active resource unit and at least one inactive resource unit. The method further comprises transmitting, to a second terminal, at least one modulation symbol through the at least one inactive resource unit.