Multicast Traffic Channel Scheduling Between Base Stations

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing carrier aggregation, particularly in ensuring seamless handovers and minimizing service interruptions during handovers or dual connectivity procedures, especially for V2X services.

Innovation Solution

Implementing a mechanism where neighboring base stations share and synchronize MBMS configuration parameters, including G-RNTI and MBMS resource parameters, to ensure consistent service provisioning across cells, thereby reducing service interruptions during handovers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If carrier aggregation is implemented to increase network capacity and throughput, then productivity is improved, but device complexity increases due to multiple base station connections

Engineering Contradiction:

Improvenetwork capacityVSAvoiddevice complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the network connection by introducing a master base station and multiple slave base stations, where the master base station handles control functions and slave base stations handle data transmission. This segmentation allows the device to maintain multiple connections while distributing complexity across different functional components.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of having the user device directly manage multiple base station connections, the patent inverts the control structure by introducing a master base station that coordinates all connections. The device only needs to maintain one control connection while multiple data connections are managed indirectly through the master base station.

Inventive Principle:

Principle #13The other way round (Inversion)

2Reliability

If handover procedures are implemented to maintain connection during mobility, then reliability is improved, but loss of time increases due to service interruptions during handover

Engineering Contradiction:

Improveconnection reliabilityVSAvoidservice interruption time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent establishes preliminary connections with multiple slave base stations before handover is needed. The user device maintains simultaneous connections with the master base station and one or more slave base stations, so when mobility requires handover, the transition is seamless as the alternative connection is already prepared and synchronized.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent ensures continuous data transmission by maintaining active connections with both master and slave base stations simultaneously. During mobility, the device can seamlessly switch between master and slave base stations without interrupting the data flow, as the slave base station is already synchronized and ready to take over immediately.

Inventive Principle:

Principle #20Continuity of useful action

Data Source

PatentUS12335983B2Single cell multicast traffic channel scheduling between two base stations

Publication Date: 2025.06.17 CANON KK

AI summary

A first base station receives, from a second base station, configuration parameters employed by the second base station for at least one multicast broadcast service, determines configuration settings for multicast broadcast services in the first base station, using the received configuration parameters, and transmits a message related to vehicle-to-everything, V2X, with use of broadcast or multicast technique, to a user equipment, UE, after determining the configuration setting for multicast broadcast service in the first base station.