Multi-Beam SSB Reception for Faster Terahertz Beam Selection

Solution Overview

Problem

Existing mobile communication systems face challenges in accommodating explosive data traffic, high-speed services, and efficient resource utilization, particularly in terahertz bands where beam widths are narrow, and simultaneous measurement of synchronization signal blocks (SSBs) is difficult.

Innovation Solution

A method and device for transmitting and receiving SSBs that allow a UE to search for and measure multiple SSBs simultaneously by acquiring configuration information from a master information block (MIB) and system information block 1 (SIB 1), selecting beams with the highest reference signal received power (RSRP), and transmitting a random access channel (RACH) through the optimal beam.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a UE sequentially searches for and measures multiple SSBs in terahertz band, then measurement accuracy can be improved, but time consumption and power consumption increase significantly

Engineering Contradiction:

ImproveSSB measurement accuracyVSAvoidSSB measurement time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The base station performs preliminary action by pre-configuring and transmitting SSBs on multiple beams simultaneously before the UE needs to measure them. The UE receives configuration information from MIB/SIB1 that indicates the presence and characteristics of multiple SSBs, allowing the UE to measure multiple beams in parallel rather than sequentially, thus reducing measurement time while maintaining accuracy

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent transitions from single-beam sequential measurement to multi-beam simultaneous measurement by utilizing the frequency dimension. Multiple SSBs are mapped to different subcarriers allocated to different beams, enabling the UE to measure multiple beams at the same time by receiving them on different frequency resources, effectively changing from time-based sequential measurement to frequency-based parallel measurement

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Measurement precision

If a UE sequentially searches for and measures multiple SSBs in terahertz band, then measurement accuracy can be improved, but power consumption increases significantly

Engineering Contradiction:

ImproveSSB measurement accuracyVSAvoidUE power consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The base station performs preliminary action by pre-configuring and transmitting SSBs on multiple beams simultaneously before the UE needs to measure them. The UE receives configuration information from MIB/SIB1 that indicates the presence and characteristics of multiple SSBs, allowing the UE to measure multiple beams in parallel rather than sequentially, thus reducing measurement time while maintaining accuracy

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent transitions from single-beam sequential measurement to multi-beam simultaneous measurement by utilizing the frequency dimension. Multiple SSBs are mapped to different subcarriers allocated to different beams, enabling the UE to measure multiple beams at the same time by receiving them on different frequency resources, effectively changing from time-based sequential measurement to frequency-based parallel measurement

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Reliability

If multiple SSBs are transmitted on multiple beams in terahertz band, then beam coverage and selection accuracy are improved, but maintaining frequency coherence becomes difficult

Engineering Contradiction:

Improvebeam selection accuracyVSAvoidfrequency coherence

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent applies universality by using a common set of resource blocks for transmitting multiple SSBs on different beams. The same resource blocks are universally used across all beams, ensuring that frequency coherence is maintained while allowing the system to perform multiple functions (transmitting multiple beams) simultaneously. This multi-functional use of resources ensures reliability in beam selection while maintaining frequency stability

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20260025216A1Method and device for transmitting or receiving ssb

Publication Date: 2026.01.22 LG ELECTRONICS INC

AI summary

A method for receiving a synchronization signal block (SSB) by a user equipment (UE) in a wireless communication system according to an embodiment of the present specification may comprise the steps of: searching for one beam among multiple beams transmitted by a base station; receiving one SSB among multiple SSBs through the found beam; acquiring a master information block (MIB) on the basis of the one SSB; acquiring configuration information for the multiple beams on the basis of the MIB; searching for remaining beams among the multiple beams on the basis of information on the multiple beams; measuring reference signal received power (RSRP) values of the multiple beams; selecting a beam having the largest RSRP value from among the multiple beams; and transmitting a random access channel (RACH) to the base station through the beam having the largest RSRP value.