Beam Footprint Handover Using Same-Cell ID and Frequency Switching

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing beam footprint handovers, particularly in non-terrestrial networks, leading to high signaling overhead and delays due to frequent cell changes and homo-frequency interference between adjacent beam footprints.

Innovation Solution

A method for beam footprint handover within the same cell, utilizing signaling to switch between beam footprints with the same physical cell ID, and associating each beam footprint with a unique frequency band to reduce signaling overhead and interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If beam footprint handover is managed as cell change in existing wireless communication systems, then handover between different cells can be achieved, but signaling overhead increases and handover delays occur due to frequent cell changes

Engineering Contradiction:

Improvehandover reliabilityVSAvoidhandover delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent merges multiple beam footprints into a single cell by assigning them the same physical cell ID. This allows the terminal to perform beam footprint handover within the same cell rather than treating it as a cell change, thereby reducing signaling overhead and handover delay while maintaining handover reliability.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If beam footprint handover is managed as cell change, then handover between different cells can be achieved, but signaling overhead increases due to frequent cell changes

Engineering Contradiction:

Improvehandover reliabilityVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

3Productivity

If adjacent beam footprints use the same frequency band, then frequency resource utilization is improved, but homo-frequency interference occurs between adjacent beam footprints

Engineering Contradiction:

Improvefrequency resource utilizationVSAvoidhomo-frequency interference

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent applies local quality by associating each beam footprint with a unique frequency band. This allows different beam footprints to use different frequency bands locally, eliminating homo-frequency interference between adjacent beam footprints while maintaining efficient frequency resource utilization through the unique association.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12550025B2Methods, terminals and base stations for beam footprint handover

Publication Date: 2026.02.10 SAMSUNG ELECTRONICS CO LTD

AI summary

The disclosure provides a method for beam footprint handover, a method for receiving information, a method for transmitting information, a terminal and a base station. The method for beam footprint handover performed by a terminal comprises the following steps: receiving a first signaling, wherein the first signaling is used for instructing the terminal to hand over from a first beam footprint to a second beam footprint; handing over from the first beam footprint to the second beam footprint in response to the first signaling; wherein a beam footprint is a coverage range of the downlink beamforming signals, the first beam footprint and the second beam footprint belong to a same cell, and downlink signals in the first beam footprint are transmitted with the first beam, while downlink signals in the second beam footprint are transmitted with the second beam.