ePDG Priority Service Bearer Creation via PCRF Policy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in LTE networks, face challenges in providing priority services to high-priority users such as those under Government Emergency Telecommunications Service (GETS) and Wireless Priority Service (WPS) during network congestion, as existing methods lack efficient mechanisms to dynamically allocate resources and ensure priority treatment.
Innovation Solution
The method involves an evolved packet data gateway (ePDG), a packet data network gateway (P-GW), and a policy and charging rules function (PCRF) working together to receive and process attachment requests from priority devices, generating modified priority data, and creating default or dedicated bearers with priority services, ensuring pre-emption capabilities and overload control based on user priority levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard call handling procedures are used during network congestion, then network resources are allocated uniformly to all users, but priority users cannot receive guaranteed service quality
Solution Approach 1:
The system performs preliminary identification of priority users through the IMS authentication framework before call establishment. The PCRF (Policy and Charging Rules Function) pre-configures priority levels and QoS parameters for authorized users, so that when congestion occurs, the priority treatment is already in place without requiring complex real-time decision-making during the call setup process.
Solution Approach 2:
The patent introduces the PCRF as an intermediary component between the authentication system and the call handling infrastructure. This mediator automatically manages priority service allocation based on pre-configured policies, eliminating the need for complex manual intervention or sophisticated real-time algorithms while ensuring reliable priority service delivery.
2Adaptability or versatility
If dynamic resource allocation mechanisms are implemented to support priority services, then priority users can receive guaranteed service during congestion, but system complexity and processing overhead increase
Solution Approach 1:
The system implements dynamic resource allocation through the PCRF, which can modify QoS parameters and priority levels in real-time based on network conditions and user authorization. The ePDG (evolved Packet Data Gateway) dynamically adjusts bearer properties during call setup to reflect the user's priority status, allowing the system to adapt to different congestion scenarios without requiring overly complex management infrastructure.
Solution Approach 2:
The patent utilizes parameter changes in the QoS (Quality of Service) framework to enable dynamic resource allocation. By modifying parameters such as priority level, guaranteed bit rate, and bearer properties based on user authorization status, the system achieves adaptable resource distribution without implementing complex allocation algorithms, thereby balancing versatility with manageable system complexity.
3Productivity
If priority modification requirements are processed through additional network functions, then priority services can be dynamically adjusted, but processing time and signaling overhead increase
Solution Approach 1:
The system performs priority verification and QoS parameter configuration in advance during the IMS authentication phase, before the actual call setup begins. The PCRF pre-determines the appropriate priority level and associated resource allocation parameters, so that when the ePDG needs to establish a priority bearer, the decision-making is already complete, minimizing additional processing time during the critical call setup phase.
Solution Approach 2:
The patent maintains continuous priority service provisioning by integrating the priority modification requirements into the existing authentication and bearer establishment workflows. Rather than introducing separate, discrete processing steps, the priority handling is embedded within the continuous IMS session management process, allowing priority services to be provisioned efficiently without significant interruptions or delays in the overall call setup timeline.
Data Source
AI summary
An ePDG is configured to receive an attachment request transmitted from a priority wireless communication device over an internet communication network and responsively transfer a create session request to a P-GW. The P-GW is configured to receive the create session request and responsively transfer a credit control request to a PCRF. The PCRF is configured to receive the credit control request and responsively determine that the priority wireless communication device has a priority modification requirement, generate modified priority data for the priority wireless communication device based on the priority modification requirement, and transfer a credit control answer with the modified priority data to the P-GW. The P-GW is configured to receive the credit control answer with the modified priority data and responsively create a default bearer between the ePDG and the P-GW for the priority wireless communication device with priority service based on the modified priority data.