IAB Node SSB Resource Selection by Mobility State

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In wireless communication systems, particularly in multi-hop networks like 5G, synchronization signal block (SSB) transmissions from mobile network nodes can collide with stationary nodes due to shared resources, leading to PCI collisions and unsuccessful communication.

Innovation Solution

Network nodes identify and utilize resources for SSB transmissions based on their mobility states, ensuring mobile and stationary nodes use different time and frequency resources to avoid collisions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If mobile network nodes use the same resources as stationary nodes for SSB transmissions, then resource utilization is improved, but PCI collisions occur leading to communication failures

Engineering Contradiction:

Improveresource utilizationVSAvoidcommunication success rate

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent segments the SSB transmission resources by mobility state, creating separate resource pools for mobile nodes (first resource pool) and stationary nodes (second resource pool). This segmentation prevents PCI collisions by ensuring that mobile and stationary nodes transmit SSBs in different time-frequency resources, while still allowing both types of nodes to utilize the overall resource structure efficiently.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by assigning different resource characteristics to different mobility states. Mobile nodes are allocated resources with specific time-frequency characteristics suitable for their mobility pattern, while stationary nodes receive resources optimized for their static position. This localized resource allocation resolves the contradiction by tailoring resource usage to specific node types.

Inventive Principle:

Principle #3Local quality

2Reliability

If separate resources are allocated for mobile and stationary nodes, then PCI collisions are reduced, but resource efficiency decreases

Engineering Contradiction:

ImprovePCI collision avoidanceVSAvoidresource efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent introduces dynamics by allowing the resource allocation to adapt based on the mobility state of each node. The system dynamically determines whether a node is mobile or stationary and assigns resources accordingly. This dynamic approach ensures reliable PCI collision avoidance while maintaining resource efficiency, as resources are not permanently dedicated but allocated based on actual mobility conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the resource allocation parameters based on mobility state parameters. By detecting whether a node is mobile or stationary, the system changes the assigned time-frequency resources, periodicity, and other transmission parameters accordingly. This parameter-based allocation resolves the contradiction by ensuring reliable communication through state-appropriate resource assignment while efficiently utilizing available resources.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP4718743A2Synchronization signal block resource selection according to mobility state

Publication Date: 2026.04.01 QUALCOMM INC

Figure 1
Figure 2
Figure 3A

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an integrated access and backhaul (IAB) node may identify one or more resources for transmitting one or more synchronization signal blocks (SSBs), the one or more resources being associated with a mobility state of the IAB node. The IAB node may transmit the one or more SSBs in the one or more resources. Numerous other aspects are provided.