Multicast Air-Interface Reservation for Efficient Mode Switching

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing PDU session switching methods for terminals to switch from point-to-point to point-to-multipoint multicast transmission mode are inefficient, requiring separate resource reservations and signaling exchanges for PDU sessions and target modes.

Innovation Solution

A method and apparatus that reserve and send multicast air interface resources based on multicast QoS information, allowing terminals to directly switch to a point-to-multipoint multicast mode without additional PDU session resource reservations, improving switching efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the terminal uses PDU session switching procedure to switch to the target network-side device, then the terminal can switch to the target mode supporting point-to-multipoint multicast, but the switching efficiency is low due to requiring separate resource reservations and signaling exchanges

Engineering Contradiction:

Improvemode switching efficiencyVSAvoidresource reservation and signaling exchange complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent combines the PDU session resource reservation with the multicast air interface resource reservation into a single unified process. The target network-side device reserves both the PDU session resources and the multicast air interface resources simultaneously, eliminating the need for separate resource reservation procedures and reducing signaling overhead between the terminal and the network-side device.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The target network-side device performs preliminary resource reservation for the multicast air interface before the terminal actually switches to the target mode. By pre-reserving the multicast air interface resources based on multicast QoS information, the system ensures that when the terminal switches modes, the resources are already prepared and ready for immediate use, reducing switching delay.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If the terminal initiates mode switching to switch to point-to-multipoint multicast transmission mode, then the terminal can use more efficient multicast data transmission mode, but the switching process is complex and time-consuming

Engineering Contradiction:

Improvemulticast data transmission efficiencyVSAvoidmode switching time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The target network-side device acts as an intermediary that automatically manages the resource reservation and mode switching process. Instead of the terminal initiating complex switching procedures, the target network-side device receives multicast QoS information, reserves the necessary resources, and guides the terminal through the switching process, simplifying the overall procedure and reducing switching time.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12414138B2Mode switching method, terminal, and network-side device

Publication Date: 2025.09.09 VIVO MOBILE COMM CO LTD

AI summary

This application discloses a mode switching method, a terminal, and a network-side device. The method may be applied to a target network-side device, and includes: reserving a multicast air interface resource in a case that multicast quality of service QoS information is received from a multicast broadcast network function MB NF, where the multicast air interface resource is used for a terminal to receive multicast service data in a switched-to target mode, and the multicast QoS information corresponds to the multicast service data; and sending the multicast air interface resource to a source network-side device or the MB NF.