SSB Detection Window Reduction Using PSS Range Signaling

Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently reducing the complexity of synchronization signal block (SSB) search space and the resulting high energy consumption and latency during the initial access procedure, especially during the initial access procedure.

Innovation Solution

The proposed method involves the use of a dual-burst synchronization signal, where the PSS carries an indication of a range of candidate locations within the SSB detection window, thereby reducing the need for a blind search of the full SSB detection window for the SSB corresponding to the peak PSS, thus reducing energy consumption and latency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the UE performs a blind search of the full SSB detection window for the SSB corresponding to the peak PSS, then the UE can ensure finding the correct SSB, but the energy consumption and latency increase significantly

Engineering Contradiction:

ImproveSSB detection reliabilityVSAvoidUE energy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The network entity performs preliminary action by transmitting the SSB position ID along with the PSS, so that the UE does not need to perform a blind search of the entire SSB detection window. The SSB position ID is provided in advance through the PSS transmission, allowing the UE to directly identify the correct SSB location and thereby reducing energy consumption and latency while maintaining detection reliability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The SSB position ID acts as an intermediary element that bridges the PSS and the corresponding SSB. Instead of requiring the UE to search blindly through the entire detection window, the SSB position ID serves as a mediator that provides direct indication of the SSB location, enabling efficient and accurate SSB detection with reduced energy consumption.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the UE performs a blind search of the full SSB detection window for the SSB corresponding to the peak PSS, then the UE can ensure finding the correct SSB, but the latency increases significantly

Engineering Contradiction:

ImproveSSB detection reliabilityVSAvoidInitial access latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The network entity performs preliminary action by transmitting the SSB position ID along with the PSS, so that the UE does not need to perform a blind search of the entire SSB detection window. The SSB position ID is provided in advance through the PSS transmission, allowing the UE to directly identify the correct SSB location and thereby reducing energy consumption and latency while maintaining detection reliability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The SSB position ID acts as an intermediary element that bridges the PSS and the corresponding SSB. Instead of requiring the UE to search blindly through the entire detection window, the SSB position ID serves as a mediator that provides direct indication of the SSB location, enabling efficient and accurate SSB detection with reduced energy consumption.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Use of energy by moving object

If the network entity transmits the SSB position ID with the PSS, then the UE can reduce the search space and lower energy consumption, but the signaling complexity increases

Engineering Contradiction:

ImproveUE energy consumptionVSAvoidSignaling complexity

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The network entity merges the PSS and SSB position ID transmission into a single integrated signaling mechanism. The SSB position ID is transmitted alongside the PSS in a combined signal structure, which simplifies the overall signaling process and avoids the need for separate, complex signaling protocols. This merging approach reduces UE energy consumption while keeping signaling complexity manageable.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The PSS serves a multi-functional purpose: it provides primary synchronization information and simultaneously carries the SSB position ID. This universal use of the PSS signal eliminates the need for dedicated separate signaling channels, thereby reducing overall system complexity while enabling energy-efficient SSB detection through the included position indication.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250386309A1Techniques for synchronization signal block detection based on primary synchronization signal synchronization signal block range signaling

Publication Date: 2025.12.18 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may detect a peak primary synchronization signal (PSS) from a PSS burst. The PSS burst may include a plurality of PSSs that correspond to a plurality of synchronization signal blocks (SSBs) of a SSB burst scheduled within an SSB detection window that follows the PSS burst. One or more resources blocks, within a time duration corresponding to the peak PSS, may be decoded to identify an SSB position ID. The SSB position ID may map to a subset of SSB IDs of the SSB burst. A reduced portion of the SSB detection window that includes the SSBs corresponding to the subset of SSB IDs may be determined, and the UE may search the reduced SSB detection window for an SSB corresponding to the peak PSS. The UE may use the SSB for completing a cell identification process.