Multicast Handover Method Using Preliminary Action

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Solution Overview

Problem

In communications technologies, handovers for multicast services in wireless networks often result in prolonged interruption times and low reliability due to the need for establishing connections with new network nodes, especially when terminals move during idle core network states.

Innovation Solution

A handover method and apparatus that involves sending and receiving specific information, including handover indications and target information, between terminals and network nodes to facilitate seamless handovers without requiring immediate re-establishment of network connections, utilizing security information and verification processes to ensure accurate handover operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If connection establishment with network nodes is performed during handover, then handover operation can be completed, but service interruption time increases and reliability decreases

Engineering Contradiction:

Improvehandover reliabilityVSAvoidservice interruption time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-establishing the multicast service connection with the target node before the terminal actually moves to it. The network side proactively sets up the service path in advance, so when handover occurs, the terminal can immediately switch to the pre-configured target node without connection establishment delay, thus reducing service interruption time while maintaining handover reliability

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If connection re-establishment is performed during handover, then terminal can access new node, but service interruption time increases

Engineering Contradiction:

Improveterminal access to new nodeVSAvoidservice interruption time

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The network side performs preliminary configuration of the target node and pre-establishes the service connection before the terminal needs to access it. This includes pre-configuring network resources and establishing data paths in advance, so the terminal can seamlessly switch to the target node during handover without performing time-consuming connection re-establishment procedures

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The network side acts as an intermediary by maintaining the multicast service connection independently of the terminal's movement. The network controller manages the service path between source and target nodes, allowing the terminal to switch access points without disrupting the underlying service connection, thus eliminating service interruption during handover

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20230164645A1Handover method and apparatus, and communications device

Publication Date: 2023.05.25 VIVO MOBILE COMM CO LTD

AI summary

A handover method and apparatus, and a communications device, are provided. The handover method includes sending first information to a source node, where the first information includes a first handover indication; or receiving first target information sent by the source node, where the first target information is used by the terminal to access a target node.