Local MB Session Control for Out-of-Area Terminal Removal
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Solution Overview
Problem
The challenge of delivering multicast broadcast services in a local service area efficiently and user-friendly manner is exacerbated by the mobility of terminal devices, particularly in IoT scenarios, where a large number of devices are involved, leading to resource inefficiencies and complex signaling.
Innovation Solution
Implementing methods and apparatus that include determining if a terminal device has left the local service area and removing it from the multicast broadcast session, with nodes like AMF and RAN managing access and mobility to optimize network resources and user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If terminal devices are allowed to join MB sessions without location verification, then user access flexibility is improved, but network resource efficiency deteriorates due to devices outside the local service area consuming broadcast resources
Solution Approach 1:
The system performs location verification before allowing terminal devices to join MB sessions. The access and mobility management function checks whether the terminal device is within the local service area prior to session establishment, preventing devices outside the area from consuming broadcast resources while maintaining flexible access for authorized users.
2Loss of energy
If location verification and session management procedures are implemented, then network resource efficiency is improved, but signaling complexity increases
Solution Approach 1:
The access and mobility management function performs multiple tasks within a unified procedure: it manages terminal device mobility, verifies location against the local service area, controls MB session establishment, and removes devices from sessions. This multi-functional approach consolidates what would otherwise be separate signaling procedures into a single integrated process.
3Adaptability or versatility
If terminal devices outside the local service area are allowed to receive MB services, then service coverage is improved, but resource utilization deteriorates due to wasteful broadcast transmission
Solution Approach 1:
The system implements location-based service delivery where MB sessions are restricted to specific local service areas. The access and mobility management function verifies whether terminal devices are within the designated local service area before allowing session joining, ensuring that broadcast resources are transmitted only to devices within the intended geographic scope and preventing waste from transmitting to devices outside the service area.
Data Source
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AI summary
The present application generally relates to wireless communication technology. More particularly, the present application relates to a method and an apparatus for providing Multicast Broadcast (MB) service in a local service area. The present application also relates to computer program product adapted for the same purpose. The present application also relates to a terminal device adapted to cooperate with the apparatus for providing MB service in a local service area. According to one aspect of the present disclosure, a method for providing Multicast Broadcast (MB) service in a local service area comprises the following steps carried out by a node configured to manage access and mobility: -a) determining whether a terminal device joining a MB session associated with the local service area is out of the local service area; -b) if the terminal device is determined to be out of the local service area, removing the terminal device from the MB session; and -c) notifying the terminal device that the MB session is unavailable.