Adaptive Periodic Uplink Resources for Spatial Beam Alignment

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Solution Overview

Problem

Existing wireless communication systems face challenges in managing periodic uplink transmissions due to beam mismatch, high latency, and excessive signaling overhead, particularly in mm-wave frequencies, leading to unreliable and inefficient data transmission.

Innovation Solution

Adapting periodic configurations based on spatial relations by associating uplink transmissions with downlink reference signals, allowing flexible and efficient updates of transmission resources and occasions, reducing beam mismatch and signaling overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If periodic uplink transmissions are configured with fixed beam directions, then beam alignment is maintained, but beam mismatch occurs when user equipment moves to different spatial locations

Engineering Contradiction:

Improvetransmission reliabilityVSAvoidspatial adaptability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent applies dynamics by making the periodic uplink transmission configuration adaptive to spatial relations. Instead of fixed beam directions, the system dynamically adjusts transmission parameters based on the spatial relationship between downlink reference signals and uplink transmissions. This allows the beam configuration to change adaptively when user equipment moves to different spatial locations, resolving the contradiction between maintaining beam alignment and adapting to spatial changes.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements feedback mechanisms where the network node monitors the spatial relationship between downlink reference signals and uplink transmissions. Based on this feedback, the system adjusts the periodic uplink transmission configuration to maintain optimal beam alignment. The feedback loop enables the system to detect beam mismatch conditions and trigger reconfiguration, thereby maintaining transmission reliability while adapting to spatial movements.

Inventive Principle:

Principle #23Feedback

2Adaptability or versatility

If frequent updates of periodic uplink transmission resources are performed, then spatial adaptability is improved, but signaling overhead increases

Engineering Contradiction:

Improvespatial adaptabilityVSAvoidsignaling overhead

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by modifying specific parameters of periodic uplink transmissions based on spatial relations. Instead of performing frequent full reconfigurations, the system selectively updates parameters such as spatial relation information, transmission occasions, or resource allocations only when spatial conditions change. This selective parameter updating approach maintains spatial adaptability while significantly reducing signaling overhead compared to frequent complete reconfigurations.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If periodic uplink transmissions use fixed time occasions, then scheduling simplicity is maintained, but latency increases when beam realignment is needed

Engineering Contradiction:

Improvescheduling simplicityVSAvoidtransmission latency

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The patent applies dynamics by making transmission occasions adaptive rather than fixed. The system dynamically adjusts the timing of periodic uplink transmissions based on spatial relation changes and beam alignment requirements. When beam realignment is needed, the system can shift transmission occasions to appropriate time slots, reducing latency while maintaining scheduling simplicity through structured adaptation rules.

Inventive Principle:

Principle #15Dynamics

4Adaptability or versatility

If multiple transmission resources are configured for different spatial relations, then spatial adaptability is improved, but resource configuration complexity increases

Engineering Contradiction:

Improvespatial adaptabilityVSAvoidconfiguration complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing transmission resources into multiple sets, each associated with specific spatial relations or downlink reference signals. This segmentation allows the system to configure resources for different spatial directions independently, improving spatial adaptability. The configuration complexity is managed through systematic association rules that map spatial relations to appropriate resource sets, making the complex configuration more organized and manageable.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12439380B2Adapting periodic configurations based on spatial relations

Publication Date: 2025.10.07 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

A method, network node and wireless device (WD) for adapting periodic configurations based on spatial relations are disclosed. According to one aspect, a method includes configuring multiple transmission resources or multiple sets of transmission occasions for a radio resource control configured periodic uplink transmission. The method further includes associating each configured uplink transmission received from the WD by the network node with a downlink reference signal, the downlink reference signal provided as a direct or indirect spatial relation reference for the uplink transmission.