UL Reference Signaling for AI Beam Pair Prediction

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Solution Overview

Problem

Existing wireless communication systems lack effective mechanisms for network-sided inference of beam pair prediction using uplink reference signaling (UL-RS), which is crucial for reducing overhead, latency, and latency in beam finding procedures, especially for moving or rotating wireless devices.

Innovation Solution

A method and apparatus for network-sided inference of beam pair prediction using UL-RS, involving configuring the wireless device to transmit UL reference signals based on a mapping between WD beams and UL reference signals, and utilizing an AI/ML model at the network node to predict suitable beam pairs, with the network node indicating the selected UL-RS to the WD for data transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If traditional beam finding procedures are used in wireless communication systems, then beam management can be performed, but overhead and latency are excessive especially for moving or rotating wireless devices

Engineering Contradiction:

Improvelatency in beam finding proceduresVSAvoidbeam management efficiency

Core Design Contradiction:

Loss of timeVSProductivity

Solution Approach 1:

The system performs preliminary actions by having the wireless device transmit uplink reference signals in multiple beams before actual data transmission. The network node measures these signals in advance and determines the best beam pair, so that when data transmission begins, the optimal beam is already identified. This preliminary beam measurement and determination process reduces the latency during actual data transmission while maintaining effective beam management.

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If comprehensive beam measurements are performed for all beam pairs, then accurate beam selection is achieved, but overhead increases significantly

Engineering Contradiction:

Improvebeam pair selection accuracyVSAvoidoverhead in beam management

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The system applies partial action by having the wireless device transmit uplink reference signals in a subset of beams rather than all possible beams. The network node measures only these selected beams and determines the best beam pair from this subset. This partial measurement approach reduces the overhead significantly while still achieving sufficient measurement precision for effective beam selection, especially for moving or rotating devices where exhaustive measurement is impractical.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS20260046003A1Method for network-sided inference of beam pair prediction using uplink reference signaling (UL-RS)

Publication Date: 2026.02.12 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

A method, system and apparatus for network-sided inference of beam pair prediction using uplink reference signaling (UL-RS) are disclosed. According to one aspect, a method in a wireless device (WD) includes determining a mapping between M beams corresponding to M spatial filters of the WD and M beam identifications (IDs), M being an integer greater than zero. The method also includes receiving a configuration of uplink reference signals. The method further includes transmitting N uplink reference signals of the received configuration in N beams of the M beams, N being an integer not greater than M.