NOMA Resource Allocation for Multi-User Wireless Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving signals using multiple antennas, particularly in allocating resources effectively for different types of user equipment (UEs) in a non-orthogonal multiple access (NOMA) scheme, which affects transmission capacity and channel estimation reliability.
Innovation Solution
A method and device for a base station with multiple antennas that transmits reference signals to UEs based on type information, generates beams using channel estimation, and allocates resources in a non-orthogonal manner, separating resources into closed-loop and open-loop spaces to support both human-type and machine-type UEs simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If non-orthogonal multiple access (NOMA) is implemented to support multiple UEs simultaneously, then transmission capacity is improved, but channel estimation reliability deteriorates due to interference between users
Solution Approach 1:
The patent segments the resource space into two distinct parts: orthogonal resources for first-type UEs (human-type) and non-orthogonal resources for second-type UEs (machine-type). This segmentation allows channel estimation for first-type UEs to be performed on orthogonal resources without interference, while second-type UEs utilize the remaining non-orthogonal resources, thereby resolving the contradiction between transmission capacity and channel estimation reliability
Solution Approach 2:
The patent applies different resource allocation strategies to different types of UEs based on their specific requirements. First-type UEs receive dedicated orthogonal resources with high quality channel estimation, while second-type UEs utilize non-orthogonal resources. This local quality differentiation optimizes overall system performance by matching resource characteristics to UE types
2Reliability
If resources are allocated orthogonally to ensure reliable channel estimation, then channel estimation reliability is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent divides the total resource pool into orthogonal and non-orthogonal segments, allocating orthogonal resources specifically for channel estimation of first-type UEs to ensure reliability, while allocating non-orthogonal resources to second-type UEs to maximize resource utilization efficiency. This segmentation resolves the contradiction by ensuring each UE type receives appropriate resource characteristics
Solution Approach 2:
The patent applies partial orthogonal resources only where necessary (for first-type UEs requiring reliable channel estimation) rather than allocating orthogonal resources to all UEs. This partial application of orthogonal resources maintains channel estimation reliability for critical users while allowing non-orthogonal resource allocation for other users, thereby improving overall resource utilization efficiency
3Productivity
If multiple UEs share the same resources in NOMA, then resource utilization efficiency is improved, but interference between users increases
Solution Approach 1:
The patent segments the user group into first-type UEs (human-type) and second-type UEs (machine-type), with first-type UEs allocated orthogonal resources that eliminate inter-user interference, while second-type UEs share non-orthogonal resources where interference is managed through power control and successive interference cancellation. This segmentation resolves the contradiction by applying interference-appropriate resource allocation to different UE types
Solution Approach 2:
The patent introduces an intermediary resource separation mechanism where orthogonal resources act as an intermediary layer for first-type UEs, providing interference-free channel estimation, while non-orthogonal resources serve as the sharing layer for second-type UEs. This intermediary structure enables resource sharing while managing interference through the orthogonal/non-orthogonal resource boundary
Data Source
AI summary
The present application provides a method for allocating resources in a wireless communication system using multiple antennas. The method for allocating resources comprising: transmitting a reference signal to first-type terminals based on type information of a plurality of terminals; receiving channel estimation information from the first-type terminals that have received the reference signal; generating beams based on the received channel estimation information; and allocating resources for the generated beams. First-type beams for the first-type terminals are primarily generated and allocated, and on the basis of the generated first-type beams, second-type beams for second-type terminals may be non-orthogonally generated and allocated when the resources for the beams are allocated.