Decoupling SS/PBCH Block Frequency Position from CORESET0

Solution Overview

Problem

The rigid correlation between the relative frequency positions of the synchronization signal/physical broadcast channel (SS/PBCH) block and control resource set 0 (CORESET0) in wireless networks leads to transmission collisions between operators, particularly in unlicensed spectrum, resulting in degraded synchronization performance and other issues.

Innovation Solution

The proposed solution involves increasing flexibility in the frequency domain position of the SS/PBCH block transmission by providing a wireless device with an intermediate reference frequency or reference frequency offset, which decouples the frequency position of the SS/PBCH block from the signaled values of K and kSSB in the master information block (MIB).

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the frequency position of SS/PBCH block is rigidly correlated with CORESET0 using fixed parameters K and kSSB, then the system maintains standardized configuration and ease of operation, but transmission collisions occur between operators in unlicensed spectrum

Engineering Contradiction:

Improvestandardized configurationVSAvoidtransmission collision

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent introduces dynamic frequency offset adjustment to the rigid frequency position correlation between SS/PBCH block and CORESET0. By allowing the frequency offset to vary based on operator-specific configurations rather than using fixed standardized parameters, the system maintains the standardized configuration framework while enabling flexible frequency positioning to avoid transmission collisions in unlicensed spectrum.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent modifies the frequency position parameters by introducing an additional frequency offset parameter that can be independently adjusted. This changes the fixed parameter relationship (K and kSSB only) into a more flexible parameter set that includes operator-specific frequency offsets, allowing the system to avoid transmission collisions while maintaining standardized operation procedures.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If the frequency position of SS/PBCH block is rigidly correlated with CORESET0, then the system structure remains simple and device complexity is low, but synchronization performance degrades due to transmission collisions

Engineering Contradiction:

Improvesystem structureVSAvoidsynchronization performance

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent introduces dynamic frequency offset adjustment to the rigid frequency position correlation between SS/PBCH block and CORESET0. By allowing the frequency offset to vary based on operator-specific configurations rather than using fixed standardized parameters, the system maintains the standardized configuration framework while enabling flexible frequency positioning to avoid transmission collisions in unlicensed spectrum.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent modifies the frequency position parameters by introducing an additional frequency offset parameter that can be independently adjusted. This changes the fixed parameter relationship (K and kSSB only) into a more flexible parameter set that includes operator-specific frequency offsets, allowing the system to avoid transmission collisions while maintaining standardized operation procedures.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If the frequency position of SS/PBCH block is rigidly correlated with CORESET0, then the initial access procedure is straightforward, but battery drain increases due to repeated failed synchronization attempts

Engineering Contradiction:

Improveinitial access procedureVSAvoidbattery drain

Core Design Contradiction:

Ease of operationVSUse of energy by moving object

Solution Approach 1:

The patent introduces dynamic frequency offset adjustment to the rigid frequency position correlation between SS/PBCH block and CORESET0. By allowing the frequency offset to vary based on operator-specific configurations rather than using fixed standardized parameters, the system maintains the standardized configuration framework while enabling flexible frequency positioning to avoid transmission collisions in unlicensed spectrum.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent modifies the frequency position parameters by introducing an additional frequency offset parameter that can be independently adjusted. This changes the fixed parameter relationship (K and kSSB only) into a more flexible parameter set that includes operator-specific frequency offsets, allowing the system to avoid transmission collisions while maintaining standardized operation procedures.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12302269B2Enhanced cell global identifier reporting

Publication Date: 2025.05.13 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

Embodiments include methods implemented in a wireless device for reporting of a cell global identifier (CGI) in a wireless network. In one embodiment, a method comprises receiving a synchronization signal/physical broadcast channel (SS/PBCH) block from a network node; locating a control resource set (CORESET) configured by the network node through determining a frequency position of the CORESET based on a value received from the network node through radio resource control signaling; and determining and reporting the CGI to the network node based on the located CORESET. In another embodiment, the CORESET is located through testing a set of one or more reference frequency candidates from which a frequency position of the CORESET is determined.