Cross-beam coupling reporting in wireless networks
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Solution Overview
Problem
In wireless communication networks, uncoordinated selection of beam pairs by network nodes leads to cross-beam coupling, causing interference, reduced throughput, increased latency, and decreased signal quality, resulting in higher retransmissions and resource consumption.
Innovation Solution
User equipment (UE) reports cross-beam coupling measurements to network nodes, enabling coordinated beam refinement during beam management procedures to select beams that minimize interference, thereby improving communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If network nodes independently select beam pairs without coordination, then beam selection is simple and fast, but cross-beam coupling interference occurs causing reduced signal quality and throughput
Solution Approach 1:
The patent implements a feedback mechanism where the UE measures reference signals from multiple TRPs and reports cross-beam coupling information back to the network nodes. This feedback loop enables the network to identify interfering beam pairs and coordinate beam selection to avoid cross-beam coupling, resolving the contradiction between fast beam selection and interference avoidance.
Solution Approach 2:
The patent performs preliminary measurements of reference signals from multiple TRPs before final beam selection is made. The UE measures and reports on potential beam pairs in advance, allowing the network to pre-identify and avoid cross-beam coupling situations, thus maintaining fast beam selection while preventing interference.
2Reliability
If network nodes coordinate beam selection to avoid cross-beam coupling, then signal quality and throughput improve, but beam management complexity increases
Solution Approach 1:
The patent enables the UE to perform self-measurement and self-reporting of cross-beam coupling conditions. The UE autonomously measures reference signals, calculates interference metrics, and reports findings to the network, reducing the complexity burden on network nodes while maintaining high signal quality through coordinated beam selection.
Solution Approach 2:
The patent segments the beam management task by having the UE handle measurement and reporting functions separately from the network nodes' beam selection functions. This segmentation distributes complexity appropriately, allowing the UE to manage measurement tasks while network nodes focus on coordinated beam selection, overall improving signal quality without excessive complexity.
3Device complexity
If beam pairs are selected without considering interference to other beams, then device complexity is reduced, but retransmissions increase due to interference
Solution Approach 1:
The patent uses feedback from UE measurements to identify beam pairs that would cause or suffer from cross-beam coupling interference. This feedback enables the network to select beam pairs that avoid interference-related retransmissions, improving transmission reliability without significantly increasing device complexity through automated interference-aware beam selection.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an apparatus may receive, via a receive beam, a first reference signal from a first transmission reception point (TRP). The apparatus may receive, via the receive beam, a second reference signal from a second TRP. The apparatus may transmit an indication of a difference between a first measurement of the first reference signal and a second measurement of the second reference signal. Numerous other aspects are described.