Service Data Transfer Continuity Across Multiple User Devices

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Solution Overview

Problem

Existing 3GPP systems fail to ensure service continuity of Internet services when a user switches devices, leading to the service restarting from the beginning on the new device instead of continuing from a breakpoint on the previous device.

Innovation Solution

A method and apparatus for ensuring service continuity by determining a target network function and sending a transfer indication to a second terminal, allowing the same network function to send service data to both the first and second terminals, thereby maintaining service continuity during device transfer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a new device starts a service from the beginning when switching devices, then the service can be played on the new device, but service continuity cannot be ensured during transfer between multiple devices

Engineering Contradiction:

Improveservice continuityVSAvoidtime to restart service

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The network device pre-establishes service data transmission paths to multiple terminals. When a terminal switches, the network device can quickly redirect service data to the new terminal using pre-configured paths, avoiding service restart and reducing time loss.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The network device copies service data transmission context from the first terminal to the second terminal. By replicating the service state and transmission parameters, the service continues seamlessly on the new terminal without restarting, maintaining adaptability while minimizing time loss.

Inventive Principle:

Principle #26Copying

2Adaptability or versatility

If service data is transmitted to multiple terminals simultaneously, then service continuity is maintained during device transfer, but network function complexity increases

Engineering Contradiction:

Improveservice continuityVSAvoidnetwork function complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The network device implements multi-functionality by serving multiple terminals with the same service data transmission function. A single network device performs the roles of serving both the first terminal and the second terminal, reducing the need for additional network elements while maintaining service continuity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The network device acts as an intermediary that manages service data transmission between the server and multiple terminals. It mediates the transfer of service context and data routing, simplifying the overall system architecture by centralizing the complexity in one intermediary rather than requiring complex peer-to-peer coordination between terminals.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP4221342B1Service data transmission methods and apparatuses

Publication Date: 2026.01.28 VIVO MOBILE COMM CO LTD

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AI summary

This application discloses a service data transmission method and apparatus, a terminal device, and a network device, and pertains to the communications field, to ensure service continuity of an Internet service during transfer between a plurality of devices of a user. The method includes: receiving a transfer indication sent by a network device; and receiving, according to the transfer indication, target service data sent by a target network function, where the target network function is a network function sending service data to a first terminal.