Relay Donor Access Node Selection for Wireless Networks
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Solution Overview
Problem
Relay wireless devices face limitations in effectively servicing end-user devices due to limited resources from donor access nodes, particularly in areas with high device density or changing signal conditions.
Innovation Solution
A method and system for access node selection in wireless networks, where a relay wireless device identifies and communicates its relay status to neighboring access nodes, measuring signal characteristics and loading information to determine an optimal donor access node for handover, ensuring sufficient throughput and quality of service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If relay wireless devices use a fixed donor access node, then device complexity is reduced, but service quality and throughput deteriorate in high-density areas or changing signal conditions
Solution Approach 1:
The patent implements dynamic donor access node selection where relay wireless devices can switch between multiple donor access nodes based on real-time signal conditions and service requirements. The system maintains a list of candidate donor access nodes and performs measurements to determine the optimal donor, enabling adaptive response to changing network conditions while maintaining manageable complexity through automated procedures.
2Reliability
If relay wireless devices dynamically select donor access nodes based on multiple features, then service quality improves, but device complexity and measurement requirements increase
Solution Approach 1:
The patent establishes preliminary procedures where relay wireless devices are pre-configured with candidate donor access node lists and measurement configurations before needing to select a donor. The system prepares measurement parameters and candidate lists in advance, so when selection is needed, the device can efficiently evaluate candidates using pre-established criteria without complex real-time decision-making.
Solution Approach 2:
The implementation includes feedback mechanisms where measurement results from candidate donor access nodes are reported back to the network, and handover decisions are made based on this feedback. The system continuously monitors signal characteristics and service quality, adjusting donor selection based on observed performance, which simplifies the selection process through iterative refinement rather than complex one-time decisions.
3Measurement precision
If relay wireless devices perform measurements of multiple candidate donor access nodes, then handover accuracy improves, but loss of time and signaling overhead increase
Solution Approach 1:
The patent applies local quality by having relay wireless devices perform measurements selectively on candidate donor access nodes that are most relevant to their current situation. Instead of measuring all possible donors uniformly, the system focuses measurements on specific candidates based on signal strength thresholds, geographic location, or service requirements, reducing measurement time while maintaining accuracy for the most promising options.
Data Source
AI summary
A relay wireless device is subject to a handoff procedure based on a signal strength and other features of a plurality of neighbor access nodes that are within range of the relay wireless device, and based on their ability to provide services to end-user wireless devices via the relay wireless device. A first access node obtains a plurality of features of the neighbor access nodes to enable determination of an optimal donor access node to provide services to the end-user devices via the relay wireless device. The first access node may obtain the features directly from each neighbor access node or by communicating with an EMS server. The features of the neighbor access nodes include loading information for each node. The loading information may be matched to the requirements of the relay wireless device.