MU-MIMO Pairing Prioritization for Relay Devices
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Solution Overview
Problem
In heterogeneous wireless networks, the existing MU-MIMO user prioritization based on channel orthogonality and SINR can reduce efficiencies and decrease overall cell-throughput, particularly at cell-edges and hotspots where relay nodes are used to boost coverage and capacity.
Innovation Solution
The system selects relay-capable wireless devices for MU-MIMO pairing based on channel orthogonality, prioritizing them for MIMO pairing to improve average cell-throughput, and allocates resources accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If users are prioritized for MU-MIMO based on channel orthogonality and SINR ratio regardless of relay node status, then pairing selection is simplified, but network efficiency and overall cell-throughput decrease
Solution Approach 1:
The patent applies local quality by differentiating the prioritization criteria based on device type. Relay-capable devices receive priority treatment in MU-MIMO pairing selection, while non-relay devices follow standard channel-based selection. This localized differentiation in selection quality improves overall network efficiency and cell-throughput by optimizing resource allocation for relay devices that serve multiple users.
2Productivity
If relay-capable devices are prioritized for MU-MIMO pairing, then network efficiency and cell-throughput increase, but pairing selection complexity increases
Solution Approach 1:
The patent segments the user population into relay-capable and non-relay-capable devices, applying different prioritization rules to each segment. This segmentation allows the system to simplify the overall selection process by first identifying relay-capable devices and giving them priority, then applying standard channel-based selection for remaining devices, thereby managing complexity through structured division.
Solution Approach 2:
The patent implements preliminary action by pre-identifying and prioritizing relay-capable devices before final MU-MIMO pairing selection. Devices are pre-categorized based on their relay capability, and this preliminary classification informs the subsequent pairing process, allowing the system to efficiently allocate resources while maintaining manageable selection complexity.
Data Source
AI summary
Systems and methods are described for selecting a wireless device to share a set of resource blocks from an access node. A channel orthogonality of a plurality of parallel data streams received at the access node from wireless devices may be determined. From the wireless devices, a non-relay capable wireless device whose channel orthogonality meets a set threshold may be selected. From the plurality of wireless devices, a relay-capable wireless device whose channel orthogonality meets a set threshold may be selected. The selected non-relay capable and relay-capable wireless devices may be paired to share a same set of resource blocks. The selected non-relay capable and relay-capable wireless devices may be scheduled for resource transmission.