Radio Base Station Synchronization via Backhaul Notification

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In mobile communication systems, achieving synchronization between radio base stations and radio terminals is often redundant when synchronization among base stations is already established, leading to inefficiencies in handover procedures and cooperative transmission processes.

Innovation Solution

Implementing a notification system where radio base stations share synchronization information through a backhaul network, allowing for the omission of synchronization procedures between base stations and radio terminals when certain synchronization differences are within predetermined thresholds, thereby optimizing handover and cooperative transmission processes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a synchronization procedure is performed between radio base stations and radio terminal in handover process, then synchronization reliability is improved, but handover time and system complexity increase

Engineering Contradiction:

Improvesynchronization reliabilityVSAvoidhandover time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The source base station performs preliminary synchronization with the radio terminal before handover and shares this synchronization information with the target base station through the backhaul network. This preliminary action allows the target base station to already be synchronized when the handover occurs, eliminating the need for redundant synchronization procedures and reducing handover time while maintaining reliability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The backhaul network acts as an intermediary to transmit synchronization information from the source base station to the target base station. This intermediary mechanism enables the target base station to acquire synchronization data without direct interaction with the radio terminal, streamlining the handover process while ensuring synchronization reliability

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If synchronization procedure is performed between radio base stations and radio terminal, then synchronization accuracy is improved, but procedure complexity and overhead increase

Engineering Contradiction:

Improvesynchronization accuracyVSAvoidprocedure complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The synchronization function is extracted from the handover procedure itself and performed separately as a preliminary action. The synchronization information is extracted from the source base station and transmitted through the backhaul network, separating these functions from the main handover流程 to reduce overall procedure complexity while maintaining synchronization accuracy

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of performing complete synchronization procedures between the target base station and radio terminal, the target base station receives a copy of the synchronization information from the source base station via the backhaul network. This copying approach maintains synchronization accuracy while significantly reducing the complexity of synchronization procedures

Inventive Principle:

Principle #26Copying

3Reliability

If complete synchronization procedure is performed during handover, then communication reliability is improved, but handover efficiency and productivity decrease

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidhandover efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

Synchronization is performed as a preliminary action before handover between the source base station and radio terminal. The resulting synchronization information is then shared with the target base station, ensuring communication reliability is maintained while enabling faster handover execution and improving overall handover efficiency

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The backhaul network serves as an intermediary to efficiently distribute synchronization information to the target base station. This intermediary mechanism ensures reliable transmission of synchronization data while streamlining the handover process and improving handover productivity by eliminating redundant synchronization steps

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10165532B2Mobile communication system, radio base station, and mobile communication method

Publication Date: 2018.12.25 KYOCERA CORP

AI summary

A mobile communication system includes a plurality of radio base stations (410) communicating with an UE (10). Each of the plurality of radio base stations (410) comprises an interface (415) that notifies another radio base station (410) of synchronization information through a backhaul network, the synchronization information designating a synchronization state between the radio base station (410) and the UE (10).