Event Subscription for SDF Group Identification in Mobile Networks
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Solution Overview
Problem
The core network function network element struggles to identify data flows belonging to the same service data flow (SDF) group due to the application function (AF) only carrying a group ID during session initiation, limiting the smooth transmission of extended reality and media (XRM) services.
Innovation Solution
Implementing a method for subscribing to member change events within an SDF group by sending event subscription information, allowing network elements to timely synchronize changes and identify data flows within the same SDF group, ensuring normal service transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the application function only carries a group ID during session initiation, then the signaling overhead is reduced, but the core network function network element cannot identify data flows belonging to the same SDF group
Solution Approach 1:
The patent applies preliminary action by having the AF send event subscription information to the NEF before data flow changes occur. This allows the NEF to proactively set up the subscription mechanism and receive notifications when data flows are added or removed from SDF groups, ensuring complete information availability without requiring continuous signaling
Solution Approach 2:
The patent implements feedback by establishing a notification mechanism where the NEF sends event notifications back to the AF when data flow changes occur within SDF groups. This feedback loop ensures the AF receives timely updates about data flow additions and removals, maintaining information completeness while using efficient event-driven communication rather than continuous polling
2Productivity
If the AF carries the group ID only when initiating the session, then the signaling overhead is reduced, but the transmission of XRM services is limited
Solution Approach 1:
The patent applies preliminary action by having the AF send event subscription information to the NEF before data flow changes occur. This allows the NEF to proactively set up the subscription mechanism and receive notifications when data flows are added or removed from SDF groups, ensuring complete information availability without requiring continuous signaling
Solution Approach 2:
The patent ensures continuity of useful action by implementing an event subscription mechanism that continuously monitors data flow changes within SDF groups. The NEF maintains the subscription state and sends notifications whenever changes occur, enabling continuous tracking of data flows without requiring repeated session establishment or continuous active polling, thus improving XRM service transmission efficiency
Data Source
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AI summary
The present application relates to the field of mobile communications, and discloses an event subscription method and apparatus, and a device. The method comprises: sending event subscribe information, wherein the event subscribe information is used for subscribing to a change event of a member in a service data flow group, and the change event is used for indicating that the member is added into the service data flow group or moved out of the service data flow group. The limitation that data flows belonging to a same service data flow group cannot be identified is overcome, a core network function network element can identify the data flows in the same service data flow group, and normal transmission of services is ensured.