Radio Terminal WWAN-WLAN Aggregation Feedback Control

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Solution Overview

Problem

Current mobile communication systems face challenges in efficiently implementing WWAN-WLAN aggregation, particularly in managing the interworking between LTE and WLAN communications, which affects the performance and reliability of dual connectivity scenarios.

Innovation Solution

The implementation of a radio terminal and base station configuration that allows for dynamic control of WWAN-WLAN aggregation by transmitting WLAN measurement information from the radio terminal to the base station, enabling adaptive management of communication bearers and resource allocation between LTE and WLAN networks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If WWAN-WLAN aggregation is implemented with dynamic control, then communication efficiency and reliability are improved, but system complexity and control overhead increase

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements feedback mechanisms where the radio terminal measures WLAN channel states and reports this information to the base station. The base station then adjusts bearer configurations and resource allocations based on this feedback, creating a closed-loop control system that improves reliability while managing complexity through automated decision-making based on measured conditions

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system dynamically adjusts bearer configurations, switching between LTE-only, WLAN-only, and aggregated modes based on real-time channel conditions. This dynamic adaptability allows the system to optimize performance for varying network conditions without requiring manual intervention, thereby improving reliability while the automation helps manage system complexity

Inventive Principle:

Principle #15Dynamics

2Productivity

If real-time WLAN measurement and control is implemented, then resource allocation efficiency is improved, but signaling overhead and processing load increase

Engineering Contradiction:

Improveresource allocation efficiencyVSAvoidsignaling overhead

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The patent implements partial measurement and reporting by the radio terminal, where only relevant WLAN channel state information is measured and reported to the base station. This selective approach provides sufficient information for effective resource allocation while minimizing the signaling overhead associated with complete system state reporting

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The radio terminal autonomously performs WLAN channel measurements and generates measurement reports without requiring continuous base station intervention. This self-service approach enables efficient resource allocation decisions while reducing the processing load on the base station and minimizing continuous signaling overhead

Inventive Principle:

Principle #25Self-service

Data Source

PatentEP3255919B1Radio terminal and base station

Publication Date: 2021.03.24 KYOCERA CORP

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AI summary

A radio terminal according to a first feature is a radio terminal which is capable of performing WWAN-WLAN aggregation communication using WWAN communication and WLAN communication simultaneously. The radio terminal transmits WLAN measurement information related to a measurement result for the WLAN communication to a specific base station through the WWAN communication while the WWAN-WLAN aggregation communication is being performed.