Gx Protocol Authorization Codes for Service Denial Reasons
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Solution Overview
Problem
Current wireless access telecommunications systems lack the ability to provide users with detailed reasons for service access denials and face signaling peaks when updating authorization information for time-based service access.
Innovation Solution
The method enhances the Gx protocol by allowing the PCRF to communicate detailed access rights information to the PCEF/GGSN, including codes for service denials and time-based authorization, enabling more informative denial messages and reducing signaling peaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the GGSN uses the existing Gx interface to obtain service authorization information from the PCRF, then the system can determine whether to allow or deny user access to services, but the GGSN cannot obtain detailed reasons for service denial, limiting its ability to provide informative denial messages to users
Solution Approach 1:
The patent segments the service authorization information into multiple distinct components: service identification, authorization status, and denial reason codes. This segmentation allows the GGSN to receive and process detailed authorization information without overwhelming the interface structure, as each component is clearly defined and can be handled independently.
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of standardized denial reason codes that mediate between the PCRF's policy decisions and the GGSN's user-facing responses. These codes act as a common language that translates complex policy reasons into actionable information for the GGSN, enabling detailed denial messaging without direct complex interaction between the GGSN and PCRF.
2Adaptability or versatility
If the system updates authorization information for time-based service access, then users can access services during authorized periods, but signaling peaks occur when updating authorization information for multiple users
Solution Approach 1:
The patent implements preliminary action by pre-defining time-based authorization rules and denial reason codes in the PCRF before they are needed. When time-based access control needs to be applied, the GGSN can immediately use these pre-configured rules without requiring real-time updates or additional signaling, thus avoiding signaling peaks while maintaining adaptability.
Solution Approach 2:
The patent uses parameter changes by introducing time-based parameters (authorized periods, denial reasons) into the authorization framework. These parameters can be configured once and reused for multiple users and time periods, allowing the system to adapt to time-based access requirements without generating continuous signaling traffic for each user or time window.
3Ease of operation
If the GGSN redirects service requests to a generic redirect address when access is denied, then users receive denial information, but they cannot understand the specific reason for denial
Solution Approach 1:
The patent implements feedback by providing the GGSN with specific denial reason codes from the PCRF that can be communicated back to users. This feedback mechanism transforms the previously one-way generic denial message into an informative two-way communication, where users receive actionable information about why their service access was denied, improving both user experience and system transparency.
Solution Approach 2:
The patent applies local quality by providing different levels of information detail in different parts of the system: the PCRF generates specific denial reasons, the GGSN receives and processes these reasons with their corresponding codes, and the user interface presents appropriately formatted messages. This localized specialization of information handling ensures that detailed denial reasons are preserved and effectively communicated without requiring uniform complexity throughout the entire system.
Data Source
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AI summary
A method (300) for a wireless telecommunication system (200) with user equipment, UE (110), and a first node (120) to which a UE may send a request for access to a service, and a control function (160) with information about the access rights to specific services for UEs in the system. The system (200) comprises an interface (150) between said first node (120) and the control function (160), and the method (300) comprises the step (3) of letting said first node receive information about a UE's access rights from said control function, and letting said first node handle access requests to a service from a UE using the access rights information from said control function. The method additionally comprises the step (3) of letting the access rights information from said control function to said first node comprise a code (X, Y, Z) regarding services to which the UE is denied access.