SSB Beam Pattern Periodicity for Energy Saving and Fast UE Access

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Solution Overview

Problem

Existing wireless communication systems, particularly 5G NR, face challenges in optimizing synchronization signal block (SSB) transmission to balance network energy consumption and user equipment (UE) access efficiency.

Innovation Solution

Configuring SSBs with different transmission periodicities based on traffic statistics to optimize energy savings and UE access, allowing for flexible SSB burst set transmission occasions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If SSB transmission periodicity is increased to reduce energy consumption, then network energy efficiency is improved, but UE access latency increases

Engineering Contradiction:

Improvenetwork energy consumptionVSAvoidUE access latency

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The patent segments the SSB transmission periodicity into multiple levels: a first periodicity for initial access SSBs and a second periodicity for other SSBs. This segmentation allows the system to optimize energy consumption for non-critical SSBs while maintaining low latency for critical initial access SSBs, thereby resolving the contradiction between energy efficiency and access latency.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different transmission periodicities to different SSBs based on their specific functions. Initial access SSBs use a shorter first periodicity to ensure rapid UE access, while other SSBs use a longer second periodicity to reduce energy consumption. This local differentiation of quality parameters resolves the contradiction by optimizing each SSB's periodicity according to its specific requirements.

Inventive Principle:

Principle #3Local quality

2Loss of time

If SSB transmission periodicity is decreased to improve UE access efficiency, then UE access latency is reduced, but network energy consumption increases

Engineering Contradiction:

ImproveUE access latencyVSAvoidnetwork energy consumption

Core Design Contradiction:

Loss of timeVSUse of energy by moving object

Solution Approach 1:

The patent divides SSB transmissions into two categories with different periodicities: initial access SSBs transmitted at a first periodicity and other SSBs transmitted at a second periodicity. This segmentation enables the system to maintain fast UE access for critical initial connection while reducing energy consumption for non-critical SSB transmissions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent assigns different periodicity characteristics to different SSB types based on their functional importance. Initial access SSBs receive a shorter periodicity (first periodicity) to ensure rapid access, while other SSBs receive a longer periodicity (second periodicity) to minimize energy consumption, thereby optimizing the local quality of each transmission.

Inventive Principle:

Principle #3Local quality

3Device complexity

If uniform SSB transmission periodicity is applied to all SSBs, then system complexity is reduced, but energy optimization capability is limited

Engineering Contradiction:

ImproveSSB configuration complexityVSAvoidnetwork energy efficiency

Core Design Contradiction:

Device complexityVSUse of energy by moving object

Solution Approach 1:

The patent segments SSB configuration into two distinct periodicity settings: a first periodicity for initial access SSBs and a second periodicity for other SSBs. This segmentation enables energy optimization by allowing different periodicities for different SSB types, while maintaining relatively simple configuration through the use of two standardized periodicity values rather than fully custom configurations for each SSB.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20250374212A1Irregular SSB beam pattern for network energy saving

Publication Date: 2025.12.04 QUALCOMM INC

AI summary

Aspects presented herein may improve network energy saving by enabling a base station to transmit SSBs in a set of SSBs with different periodicities. In one aspect, a base station configures each SSB in a set of SSBs with an SSB transmission periodicity for a time period, the time period including multiple SSB burst set transmission occasions, where at least a first SSB and a second SSB in the set of SSBs are configured with different SSB transmission periodicities. The base station transmits the set of SSBs based on a corresponding SSB transmission periodicity of each SSB over the time period.