PCC Rule Updates for Overlapping Event Subscription Detection
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Solution Overview
Problem
Conventional communication systems can only detect one event when two events with the same or overlapping data description information are subscribed to, leading to incomplete event notifications.
Innovation Solution
A method and apparatus that updates policy and charging control rules to include indications for multiple events, allowing simultaneous detection of events with the same or overlapping data description information by a policy control entity or session management entity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UPF performs matching on data packets based on filter templates and priorities in PDR, then one event can be detected, but only one event notification can be received even when two events with same or overlapping data description information are subscribed
Solution Approach 1:
The patent segments the PCC rule into distinct components: filter template (for data description matching) and event indication information (for specifying which events to detect). This segmentation allows multiple event indications to be associated with a single filter template, enabling the detection of multiple events with the same or overlapping data description information while maintaining clear rule structure.
Solution Approach 2:
The filter template serves a universal function by being reusable across multiple PCC rules for different events. Instead of creating separate filter templates for each event with identical data description, the same filter template can be referenced by multiple PCC rules, each with different event indication information, thereby enabling multi-event detection without redundancy.
2Productivity
If one service data flow matches only one PDR, then matching procedure is simple, but multiple events with same data description cannot be detected simultaneously
Solution Approach 1:
The patent performs preliminary action by pre-configuring multiple PCC rules with different event indication information but the same or overlapping filter templates during session establishment or policy update. This allows the UPF to be pre-prepared to detect multiple events, eliminating the need for sequential rule creation or complex runtime decision-making when events occur.
Solution Approach 2:
The patent adds another dimension to the PCC rule structure by introducing event indication information as a separate layer beyond the filter template. This dimensional expansion allows the system to differentiate between multiple events based on event type rather than data description, enabling simultaneous detection of multiple events without increasing the complexity of data packet matching.
3Loss of information
If the SMF receives only one event notification, then event processing is straightforward, but comprehensive event monitoring is incomplete
Solution Approach 1:
The patent implements feedback by establishing a many-to-many correspondence between PCC rules and event notifications. Each PCC rule with event indication information provides feedback about a specific event type, and the SMF receives multiple event notifications corresponding to different event types. This feedback mechanism ensures complete event information is captured while maintaining clear mapping between rules and notifications for easy processing.
Data Source
AI summary
This disclosure provides an event subscription method. A policy control entity receives information about a first event from a session management entity, where the information about the first event includes subscription indication information of the first event and first data description information of the first event. The policy control entity determines that second data description information of a second policy and charging control (PCC) rule is the same as the first data description information, where the second data description information is data description information of a second event, and the second PCC rule includes second indication second information indicating to detect the second event. The policy control entity, based on the subscription indication information, updates the second PCC rule obtain a first PCC rule, and sends, the first PCC rule comprising the second indication information and first indication information indicating to detect the first event, to the session management entity.