Mobile Relay Intra-Frequency Reselection With Broadcast Offsets

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Solution Overview

Problem

Existing cellular communication systems face challenges in efficiently managing cell reselection procedures for mobile relay nodes, particularly in scenarios involving mobile IAB nodes, where frequent updates to offset values are required, leading to inefficiencies and increased signaling overhead.

Innovation Solution

A communication control method that involves broadcasting an offset value specific to mobile relay nodes, allowing user equipment to execute intra-frequency cell reselection procedures without frequent updates, thereby optimizing cell reselection processes for mobile IAB nodes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If frequent updates to offset values are performed in cell reselection procedures for mobile relay nodes, then cell reselection accuracy is improved, but signaling overhead increases

Engineering Contradiction:
Improvecell reselection accuracyVSAvoidsignaling overhead
Core Design Contradiction:
Measurement precisionVSLoss of information

Solution Approach 1:

The patent applies preliminary action by pre-calculating and storing offset values in the relay node before they are needed for cell reselection. The relay node determines offset values based on its mobility state and stores them locally, so that when cell reselection is required, the pre-computed offset can be immediately applied without requiring real-time network signaling updates. This resolves the contradiction by preparing the accuracy-enhancing offset values in advance, eliminating the need for frequent signaling updates.

Inventive Principle:
Principle #10Preliminary action

2Productivity

If frequent updates to system information blocks are performed, then cell reselection efficiency is improved, but network resource consumption increases

Engineering Contradiction:
Improvecell reselection efficiencyVSAvoidnetwork resource consumption
Core Design Contradiction:
ProductivityVSLoss of energy

Solution Approach 1:

The patent implements self-service by enabling the relay node to autonomously determine and apply offset values based on its own mobility state without requiring continuous network intervention. The relay node monitors its mobility state and automatically selects appropriate offset values from its stored set, performing the cell reselection optimization function independently. This eliminates the need for frequent network-initiated system information block updates, thereby improving cell reselection efficiency while reducing network resource consumption.

Inventive Principle:
Principle #25Self-service

3Reliability

If offset values are updated in real-time for mobile relay nodes, then communication reliability is improved, but system complexity increases

Engineering Contradiction:
Improvecommunication reliabilityVSAvoidsystem complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies dynamics by making the offset value selection adaptive to the relay node's mobility state. The system maintains a set of offset values corresponding to different mobility states (e.g., stationary, slow-moving, fast-moving), and the relay node dynamically selects the appropriate offset based on its current mobility condition. This dynamic adaptation ensures communication reliability is maintained across varying mobility scenarios without requiring complex real-time calculation or centralized control, as the mobility-state-based selection simplifies the decision-making process.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS20250267523A1Communication control method
Publication Date: 2025.08.21 KYOCERA CORP
  • US20250267523A1 patent drawing
  • US20250267523A1 patent drawing
  • US20250267523A1 patent drawing

AI summary

In an aspect, a communication control method is a communication control method to be used in a cellular communication system. The communication control method includes a step of broadcasting, by a relay node, an offset value for a mobile relay node and a step of executing by a user equipment, an intra-frequency cell reselection procedure by using the offset value for a mobile relay node.