Policy Control Function Event Subscription Segmentation
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Solution Overview
Problem
Current 3GPP specifications lack clear definitions for bulk subscription and event exposure services in the Policy Control Function (PCF), particularly regarding the applicability of subscriptions to predefined and dynamic policy charging control (PCC) rules and the inclusion of notification information about affected resources and rules.
Innovation Solution
Incorporating new Event Filter Information types such as 'Subscribed Resource Types' and 'Services Information' to differentiate between predefined and dynamic PCC rules, and using 'Additional Event Info' to provide detailed notifications about affected resources, including 'Related Resources Identification' for precise event reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If bulk subscription to events is implemented in PCF, then event exposure functionality is improved, but the specification definitions are vague and incomplete
Solution Approach 1:
The patent segments the event subscription mechanism by introducing separate event parameter types (Event Filter Information, Event Reporting Information) that can be independently configured. This allows clear differentiation between predefined and dynamic PCC rules, and enables selective subscription to specific event types without requiring complete specification rewrites.
Solution Approach 2:
The patent applies preliminary action by pre-defining the event parameter structures and notification formats in the specification before implementation. The Event Filter Information and Event Reporting Information are standardized in advance, allowing PCF to handle bulk subscriptions with clear, unambiguous definitions from the outset.
2Measurement precision
If subscription applicability is differentiated between predefined and dynamic PCC rules, then subscription precision is improved, but the complexity of event filter information increases
Solution Approach 1:
The patent segments the event filter information into distinct parameter types: Event Filter Information for subscription criteria and Event Reporting Information for notification content. Within Event Filter Information, separate fields indicate applicability to predefined versus dynamic PCC rules, enabling precise differentiation without creating a monolithic complex structure.
Solution Approach 2:
The patent applies local quality by making the applicability indication specific to particular fields within the event filter information structure. Rather than making the entire structure complex, only the relevant portions (event filter information types, notification content) are differentiated, keeping the overall structure manageable while providing precise subscription control.
3Loss of information
If detailed notification information about affected resources is provided, then event reporting completeness is improved, but the notification message size and processing complexity increase
Solution Approach 1:
The patent segments notification information into optional Event Reporting Information fields that can be selectively included. The notification structure separates mandatory event identification fields from optional detailed resource information fields, allowing complete event reporting without always including full resource details, thus controlling message size.
Solution Approach 2:
The patent applies partial action by providing detailed notification information only when necessary and relevant to the subscription type. The Event Reporting Information can be selectively included based on the subscription parameters, avoiding unnecessary data transmission for simple subscriptions while providing complete details when needed.
Data Source
AI summary
The disclosure provides various methods, apparatus and computer-readable mediums supporting subscriptions to events in a core network. One method in a network exposure function for a core network comprises: providing, to a policy control function for the core network, a subscription request message indicating a request for a subscription for a plurality of terminal devices to receive notifications of events from the policy control function. The subscription request message comprises one or more of: an indication of one or more identifiers of events for which the plurality of terminal devices are to receive notifications; an indication of a type of resources to which the subscription relates; an indication of one or more services defined in the policy control function to which the subscription relates; and an indication as to whether notifications of events are to comprise an indication of one or more rules affected by the event.