MBMS Reception Continuity in Mobile Handover

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Solution Overview

Problem

Mobile communication systems face inefficiencies when MBMS data is transmitted in a unicast manner by specific cells, which do not support broadcasting, leading to a decline in network efficiency compared to broadcasting.

Innovation Solution

A mobile communication method that determines whether to continue MBMS data reception in a general cell based on the operation state and service state of the specific cell, allowing for continuous MBMS data reception while minimizing network efficiency decline by managing handovers between general and specific cells.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If MBMS data is transmitted in a unicast manner by specific cells, then the mobile terminal can receive MBMS data, but network efficiency declines

Engineering Contradiction:

ImproveMBMS data reception continuityVSAvoidnetwork efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent implements dynamic cell selection and handover mechanisms that adapt the MBMS data transmission mode based on real-time network conditions and terminal requirements. The system dynamically switches between broadcast and unicast modes, and performs handovers between cells, to optimize both reception continuity and network efficiency under varying operational conditions

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes operational parameters such as transmission mode (broadcast/unicast), cell selection criteria, and handover thresholds based on network load, terminal capability, and service requirements. By adjusting these parameters dynamically, the system achieves efficient resource utilization while maintaining reliable data reception

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If the mobile terminal performs handover from general cell to specific cell, then the terminal can utilize specific cell resources, but MBMS data reception may be interrupted

Engineering Contradiction:

Improvecell resource utilizationVSAvoidMBMS data reception continuity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent performs preliminary actions by pre-configuring handover parameters, pre-establishing broadcast session information, and pre-assessing cell capabilities before actual handover occurs. This preparation ensures that when handover is executed, the MBMS data reception can continue seamlessly without interruption

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces intermediary mechanisms such as broadcast session information transfer protocols and coordinated handover management between source and target cells. These intermediaries facilitate the smooth transfer of broadcast session state during handover, maintaining reception continuity while enabling cell resource optimization

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP3206432B1Mobile communication method, mobile terminal and radio base station

Publication Date: 2018.10.17 KYOCERA CORP

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AI summary

A mobile communication method is a method for distributing MBMS data to a mobile terminal in a mobile communication system including a general cell supporting a broadcasting of the MBMS data and a specific cell not supporting the broadcasting of the MBMS data, comprising: a step A of determining whether or not to continue a reception of the MBMS data in the general cell, based on at least one of an operation state of the specific cell and a state of service with which the mobile terminal is provided by the general cell, when the mobile terminal receives, in a connected state, the MBMS data broadcasted from the general cell in a connected state.