Core Network Multicast Session Area Information Signaling
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Solution Overview
Problem
In a Multi-cast Broadcast Service (MBS) scenario, when the status of a session is updated to 'active', the Access and Mobility Management Function (AMF) unnecessarily pages all User Equipment (UE), leading to increased signaling overheads and disturbance.
Innovation Solution
A method where a first core network function sends area information to a second core network function when a multicast session or service is active, allowing the second core network function to select specific UEs, paging areas, or radio access network nodes for targeted notifications, reducing unnecessary signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the AMF pages all UEs when a multicast session status is updated to active, then all UEs are notified of the active status, but unnecessary signaling overheads are generated and UEs outside the service area are disturbed
Solution Approach 1:
The patent segments the notification process by introducing area information that divides the network into service areas. The AMF uses this segmentation to page only UEs within the relevant service area rather than all UEs globally, thus reducing unnecessary signaling while ensuring reliable notification to targeted UEs.
Solution Approach 2:
The patent applies local quality by making the paging notification localized to specific service areas rather than universal. Area information is used to identify which local regions should receive notifications, ensuring that only UEs within the appropriate service area are paged, thereby reducing overall signaling overhead while maintaining notification reliability for affected UEs.
2Reliability
If the AMF pages all UEs when a multicast session status is updated to active, then all UEs are notified of the active status, but the signaling process becomes unnecessarily complex
Solution Approach 1:
The patent simplifies the signaling process by segmenting it into two parts: first, area information is sent to the AMF; second, the AMF uses this area information to selectively page only relevant UEs. This segmentation reduces the complexity of the overall signaling process compared to paging all UEs universally, while still ensuring reliable notification coverage for UEs within the service area.
3Loss of energy
If area information is sent to enable selective paging, then signaling overhead is reduced, but the system requires additional information management
Solution Approach 1:
The patent applies preliminary action by having area information sent to the AMF in advance before the paging operation occurs. This pre-positioning of area information allows the AMF to efficiently perform selective paging without requiring complex real-time information management during the actual notification process, thus reducing signaling overhead while keeping information management complexity manageable.
Data Source
AI summary
This application discloses a method and an apparatus for processing a multicast service, and a network device. The method includes: A first core network function sends first area information to a second core network function when a multicast session or service is active. The first area information is used for at least one of the following processes: the second core network function selects a first terminal; the second core network function sends information about a first terminal to the first core network function; the second core network function selects a paging area; or the second core network function selects a first radio access network (RAN) node.