Serving Base Station L1/L2 Triggered Mobility Cancellation

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing mobility events, particularly in heterogeneous networks, leading to suboptimal handover performance and increased latency.

Innovation Solution

Implementing Layer 1/Layer 2 (L1/L2) triggered mobility cancellation mechanisms at the serving base station to optimize handover processes by canceling unnecessary mobility events and improving handover efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If traditional mobility management mechanisms are used in heterogeneous networks, then comprehensive coverage is maintained, but handover latency increases and handover performance deteriorates

Engineering Contradiction:

Improvehandover latencyVSAvoidhandover performance

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

The patent extracts and separates the mobility cancellation function from the traditional mobility management framework. The serving base station independently determines and cancels unnecessary L1/L2 triggered mobility events without requiring coordination with target base stations, thereby reducing handover latency while maintaining reliability through selective cancellation based on channel quality measurements

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent implements preliminary action by having the serving base station proactively cancel mobility events before handover execution when channel quality indicators suggest the target cell is unsuitable. This preliminary cancellation prevents unnecessary handover procedures, reducing latency while maintaining connection stability with the serving cell

Inventive Principle:

Principle #10Preliminary action

2Productivity

If L1/L2 triggered mobility cancellation is implemented, then handover efficiency improves and latency reduces, but system complexity increases

Engineering Contradiction:

Improvehandover efficiencyVSAvoidbase station processing complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The serving base station performs self-service by independently evaluating channel quality indicators and making autonomous decisions to cancel unnecessary mobility events. This self-service approach eliminates the need for complex inter-base station coordination mechanisms, reducing system complexity while improving handover efficiency through rapid local decision-making

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent changes the decision-making parameters by using channel quality indicators (CQI) as the primary basis for mobility cancellation decisions. This parameter-based approach simplifies the complexity by replacing complex multi-factor evaluation with straightforward CQI threshold comparisons, enabling efficient handover management through parameter-driven automation

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250301380A1Layer 1 or Layer 2 Triggered Mobility Cancelation by Serving Base Station

Publication Date: 2025.09.25 OFINNO LLC

AI summary

A first base station sends, to a second base station, a handover request message, for a wireless device, comprising an identifier of a candidate cell for a layer 1/layer 2 triggered mobility (LTM) and a request for LTM information. The request for the LTM information comprises an identifier of an LTM candidate configuration of the candidate cell for the LTM. The first base station sends, to the second base station, a message indicating a cancelling of the LTM.