Local CHF Relocation for Low-Latency 5G Charging Authorization
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Solution Overview
Problem
Existing charging systems in 5G networks experience significant latency due to the need for authorization from a fixed CHF, which is distant from the wireless device's current location, especially in high-speed networks.
Innovation Solution
Dynamically relocate a subscriber's account information to a local CHF closer to the wireless device's current location during registration, reducing the need for authorization from a distant fixed CHF.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If account information is stored at a fixed CHF location, then system architecture is simplified, but latency increases due to distance from wireless device
Solution Approach 1:
The patent applies dynamics by transitioning from a static fixed CHF architecture to a dynamic system where the CHF location changes based on wireless device mobility. The CHF is relocated to follow the subscriber's current location, making the system adaptive and responsive to movement, thereby reducing latency while maintaining architectural coherence through virtualization.
Solution Approach 2:
The patent introduces a mobility management entity as an intermediary that coordinates between the wireless device's current location and the CHF. This intermediary manages the relocation process, handling the complexity of dynamic positioning while allowing the CHF to remain logically centralized, thus reducing latency without proportionally increasing system complexity.
2Speed
If CHF is located far from wireless device, then hardware infrastructure is simplified, but service authorization speed decreases
Solution Approach 1:
The patent uses copying by creating virtual instances of the CHF that can be dynamically instantiated at different locations. Instead of physically moving hardware, the system copies the CHF's functional capabilities to locations closer to wireless devices, enabling faster service authorization while keeping the core hardware infrastructure centralized and simplified.
Solution Approach 2:
The patent transitions from a single-dimensional fixed location model to a multi-dimensional approach where the CHF can exist in multiple virtual locations simultaneously. This dimensional expansion allows the system to provide fast authorization services to multiple devices at different geographic locations without proportionally increasing physical hardware complexity.
3Loss of time
If account information is dynamically relocated, then latency is reduced, but data management complexity increases
Solution Approach 1:
The patent applies copying by creating virtual copies of account information that can be accessed from multiple locations. When a wireless device moves, the system copies the relevant account data to the new location's CHF instance, maintaining data access speed without requiring complex real-time synchronization of a single data source, thus reducing latency while managing complexity through redundancy.
Solution Approach 2:
The patent makes the CHF system universal by designing it to perform multiple functions: serving as both a centralized authentication authority and a distributed data access point. This multi-functionality allows the same CHF infrastructure to handle both static and dynamic location scenarios, reducing data access latency without requiring separate specialized systems for each function.
Data Source
AI summary
A system of a wireless telecommunications network performs a process initiated in response to an indication of a chargeable event (e.g., a registration procedure). The system obtains a current location of the wireless device, determines that the current location is different from a home location, and queries a database of a home charging function (CHF) for charging information of a subscriber associated with the wireless device. The system then dynamically stores the charging information at a database of a local CHF thereby eliminating the need to check with the home CHF when responding to every subsequent chargeable event, which reduces the service latency otherwise experienced by the wireless device.