Relay Access Node Multi-DeNB Selection for Wireless Backhaul
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Solution Overview
Problem
Wireless networks face challenges in providing high-quality service to increasing numbers of devices due to limited resources at Donor Access Nodes (DeNBs), which affects the ability of relay nodes to effectively service end-user devices, particularly in areas with high device density and limited backhaul capacity.
Innovation Solution
The implementation of an iRelay Access Node (AN) that prioritizes and selects multiple DeNBs based on signal strength and throughput metrics to establish robust backhaul connections, using directional antennas and coordinated multipoint techniques to enhance data transmission and increase available bandwidth for end-user devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay nodes are deployed at the edge of radio range to improve coverage and QoS, then coverage area and service quality are improved, but the ability to effectively service end-user devices deteriorates when resources at DeNB are limited
Solution Approach 1:
The relay access node dynamically selects and connects to multiple candidate DeNBs based on real-time signal quality metrics and calculated priorities. The system continuously monitors radio link quality and adapts its backhaul connections, transitioning from static single-DeNB attachment to dynamic multi-DeNB connectivity, thereby maintaining reliable service under varying resource conditions
Solution Approach 2:
The system changes the parameter of DeNB selection from single-node to multi-node connectivity. By calculating priority metrics for multiple candidate DeNBs and establishing connections with the highest-prioritized ones, the relay node transforms its backhaul architecture from serial to parallel connectivity, improving service capability while maintaining QoS
2Productivity
If multiple candidate DeNBs are connected to increase available throughput, then network capacity and bandwidth are improved, but system complexity and resource management difficulty increase
Solution Approach 1:
The relay access node autonomously performs DeNB selection by automatically scanning for candidate DeNBs, calculating their priority metrics based on signal quality, and establishing connections without external intervention. The system self-manages the complexity of multi-DeNB coordination through automated priority-based selection and dynamic connection management
Solution Approach 2:
The system implements feedback mechanisms where the relay node continuously monitors radio link quality metrics from multiple candidate DeNBs, calculates priority values based on this feedback, and dynamically adjusts its connections. This closed-loop feedback system manages the complexity of multi-DeNB operations by using real-time performance data to guide connection decisions
Data Source
AI summary
Systems and methods are described for donor access node (DeNB) selection at a relay access node (AN). A plurality of DeNBs may be identified, the DeNBs being located within a radio range of the relay AN. A metric may be calculated at the relay AN and used by the relay AN to select multiple, preferred DeNBs from the plurality of DeNBs. The relay AN may simultaneously request a connection to each of the multiple, preferred DeNBs. Data signals may be combined for transport at the relay AN and sent to end-user wireless devices, the multiple, preferred DeNBs, or both.