NOMA User Transfer Between Access Points for IUI Balancing
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Solution Overview
Problem
Existing Non-Orthogonal Multiple Access (NOMA) schemes in wireless telecommunications networks face challenges in managing Inter-User-Interference (IUI) across different access points, leading to uneven performance and quality of service.
Innovation Solution
A method is introduced to manage users by identifying and transferring them between access points based on Inter-User-Interference (IUI) data, using a centralized entity like the Access and Mobility Function (AMF) to balance IUI across base stations, and adjusting user location reporting rates based on speed and QoS requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If NOMA schemes are used to improve data rates by allowing multiple users to share the same resources concurrently, then network capacity and throughput are improved, but inter-user interference increases and becomes difficult to manage across multiple access points
Solution Approach 1:
The patent implements a feedback mechanism where a centralized entity (AMF) collects IUI measurements from multiple access points and uses this information to dynamically manage user distributions. The AMF receives IUI data from gNBs, determines optimal user placements, and orchestrates handovers to balance IUI across the network, creating a closed-loop control system that continuously adapts to interference conditions.
Solution Approach 2:
The patent introduces a centralized intermediary entity (AMF) that mediates between multiple access points and the core network. This intermediary collects IUI measurements from gNBs, processes the interference data centrally, and makes coordinated user placement decisions across the network, enabling global optimization of NOMA resource allocation while managing interference systematically.
2Device complexity
If users are concentrated at a single access point to simplify resource management, then operational complexity is reduced, but inter-user interference increases and quality of service deteriorates
Solution Approach 1:
The centralized AMF acts as an intermediary that maintains global visibility of IUI conditions across all access points without requiring complex distributed coordination between gNBs. The AMF consolidates interference management functions, simplifying the operational complexity at individual access points while ensuring QoS through centralized optimization of user distributions.
Solution Approach 2:
The system implements feedback loops where gNBs measure and report IUI levels to the AMF, which then adjusts user placements to maintain QoS targets. This feedback mechanism enables the network to automatically respond to changing interference conditions and user mobility patterns, maintaining service reliability without manual intervention or complex distributed algorithms.
3Reliability
If user distribution is optimized to balance IUI across access points, then quality of service is improved, but additional signaling and coordination overhead is required between access points and centralized entities
Solution Approach 1:
The patent extracts the complex IUI measurement and analysis functions from individual access points and consolidates them in the centralized AMF. gNBs perform only simple measurements and report results to the AMF, which handles the computationally intensive tasks of IUI analysis, user placement optimization, and handover coordination, reducing signaling overhead compared to distributed approaches.
Solution Approach 2:
The AMF serves as an intermediary that consolidates information from multiple gNBs and makes centralized decisions, reducing the need for extensive peer-to-peer signaling between access points. This hierarchical approach minimizes signaling overhead by processing interference management information centrally rather than requiring multiple rounds of negotiation between distributed entities.
Data Source
AI summary
This disclosure provides a method of managing users in a wireless telecommunications network having a first access point and a second access point, wherein the first access point communicates with a first set of users using Non-Orthogonal Multiple Access (NOMA) and the second access point communicates with a second set of users using NOMA, the method including obtaining data indicating Inter-User-Interference (IUI) for users of the first access point; obtaining data indicating IUI for users of the second access point; and based on the IUI for users of the first access point and the IUI for users of the second access point, identifying one or more users to transfer between the first and second access point; and causing a transfer of the one or more users identified for transfer.