Dynamic RAN Multicast Area Management for 5G Mobility
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Solution Overview
Problem
The existing Multimedia Broadcast / Multicast Service (MBMS) architecture in 5G networks is inflexible and not well-suited for dynamic geographical broadcast areas based on user distribution, particularly for over-the-top media consumption and IoT services, as it relies on static configuration of MBMS service areas which do not adapt to changing user locations or service models.
Innovation Solution
The implementation of a Radio Access Network (RAN) based Multicast Area (RMA) management system that dynamically adjusts the list of cells for multicast data transmission based on user mobility and state changes, allowing for flexible and adaptive multicast content delivery across multiple cells, using both unicast and multicast data radio bearers to optimize resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If static configuration of MBMS service areas is used, then network architecture is simple, but adaptability to changing user locations and service models deteriorates
Solution Approach 1:
The patent implements dynamic multicast area management where the RAN multicast area is automatically adjusted based on UE mobility patterns and service requirements. The system transitions from static MBMS service area configuration to dynamic RMA management that adapts to changing user locations and distribution patterns, resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The system enables self-service through automated RMA configuration and adjustment based on observed UE behavior and service patterns. The network automatically manages multicast area boundaries and cell compositions without requiring manual intervention, allowing adaptability while controlling operational complexity.
2Use of energy by moving object
If UEs maintain connected state for multicast reception, then service continuity is ensured, but energy consumption increases
Solution Approach 1:
The system performs preliminary actions by pre-configuring UEs with RMA information and multicast reception parameters before transitioning to inactive state. This allows UEs to maintain multicast service continuity while in energy-saving inactive state, resolving the contradiction between energy consumption and service reliability.
Solution Approach 2:
The patent changes the operational parameters of UEs by transitioning them between connected and inactive states while maintaining multicast service through RMA configuration. This parameter change allows energy savings while preserving service continuity through the inactive state mechanism.
3Productivity
If multicast areas are dynamically adjusted, then resource efficiency improves, but system complexity increases
Solution Approach 1:
The system implements feedback mechanisms that monitor UE distribution patterns, mobility behaviors, and service requirements to automatically adjust RMA configurations. This feedback-driven approach optimizes resource efficiency while managing complexity through automated decision-making based on observed network conditions.
Solution Approach 2:
The patent dynamically changes multicast area parameters including cell compositions, area boundaries, and configuration timing based on network conditions and service requirements. These parameter changes improve resource efficiency while the automated nature of the changes controls the increase in system complexity.
Data Source
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AI summary
A technique includes transmitting a request for the delivery of multicast data; receiving the multicast data via a unicast data radio bearer or a multicast data radio bearer, wherein the user device is located in a first cell; receiving, by the user device from the base station, a connection suspend message, wherein the connection suspend message includes: information describing a radio access network (RAN) multicast area (RMA) for the delivery of the multicast data via a multicast data radio bearer, and a group identifier associated with the multicast data, wherein the RMA includes a list of one or more cells that has been updated by the base station to include the first cell where the user device is located; entering, by the user device, a low activity state in response to the connection suspend message; and, receiving, by the user device, the multicast data via the multicast data radio bearer.