Wireless Carrier Disconnection via Base Station Coordination

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Solution Overview

Problem

In wireless communication systems using LTE-A with carrier aggregation technology, the number of component carriers that can be used is limited by the number of base stations, leading to insufficient communication rates in some cases.

Innovation Solution

A wireless communication system that allows a mobile station device to communicate with multiple base station devices using different component carriers, with a mechanism for disconnecting secondary component carriers based on traffic thresholds and communication environment measurements to optimize bandwidth usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If carrier aggregation technology is used with multiple base station devices, then communication rate is improved, but device complexity increases

Engineering Contradiction:

Improvecommunication rateVSAvoiddevice complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent divides the carrier aggregation management into separate functional units: a disconnection preparation requesting unit in the first base station device, and a disconnection preparation executing unit in the second base station device. This segmentation allows complex multi-base station carrier management to be broken down into manageable, specialized components, reducing overall system complexity while enabling higher communication rates through coordinated carrier usage.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a disconnection preparation request message as an intermediary mechanism between base station devices. This standardized message format acts as a mediator that enables coordinated carrier disconnection decisions across multiple base stations, simplifying the interaction protocol and reducing the complexity of direct peer-to-peer coordination while maintaining high communication efficiency.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If secondary component carriers are disconnected dynamically, then resource allocation efficiency is improved, but control signaling overhead increases

Engineering Contradiction:

Improveresource allocation efficiencyVSAvoidcontrol signaling overhead

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The patent implements a disconnection preparation mechanism where the first base station device sends a disconnection preparation request message to the second base station device before actually disconnecting the secondary component carrier. This preliminary action allows the second base station to prepare for the disconnection in advance, optimizing resource allocation efficiently while the standardized request message keeps control signaling overhead manageable through pre-coordination rather than reactive communication.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS9750021B2Wireless communication system, wireless communication method, mobile station device, base station device, program, and recording medium

Publication Date: 2017.08.29 SHARP KK

AI summary

A wireless communication system includes a first base station device, a second base station device, a mobile station device configured to communicate with the first base station device using a first component carrier and to communicate with the second base station device using a second component carrier. The first base station device includes a disconnection preparation requesting unit configured to transmit to the second base station device, a disconnection preparation request that requests the second base station device to prepare to disconnect the second component carrier.