Serving Gateway PDN Priority Management
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Solution Overview
Problem
Single-PDN user devices, such as narrowband Internet of Things (NB-IoT) devices, cannot prioritize connections to multiple packet data networks (PDNs) and efficiently manage connections, leading to suboptimal service quality and resource management.
Innovation Solution
Implementing a serving gateway (SGW) device that allows user devices to connect to PDNs based on a priority list, enabling the establishment, suspension, and termination of connections according to predefined priorities and time limits, facilitating efficient management of network resources and improving service quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-PDN user device connects to multiple PDNs simultaneously, then the device can access more network services, but the device cannot prioritize connections and efficiently manage connections
Solution Approach 1:
The patent introduces a serving gateway (SGW) device as an intermediary between the user device and multiple PDNs. The SGW receives connection requests from the user device, determines the appropriate PDN based on priority information, and establishes connections accordingly. This mediator handles the complexity of multi-PDN management, allowing the user device to benefit from multi-PDN access without bearing the management burden.
Solution Approach 2:
The system pre-configures priority information for different PDNs before connection requests are made. The SGW stores and retrieves this priority information to make deterministic connection decisions. By performing the prioritization logic in advance and storing it centrally, the system avoids complex real-time decision-making at the user device.
2Ease of operation
If a single-PDN user device connects to only one PDN at a time, then connection management is simple, but service quality is suboptimal
Solution Approach 1:
The serving gateway acts as a smart intermediary that enables single-PDN devices to indirectly access multiple PDNs. The SGW receives connection requests, uses priority information to determine the appropriate PDN, and establishes the connection on behalf of the user device. This maintains the simplicity of the user device while achieving multi-PDN service quality.
3Productivity
If the system manages connections for hundreds or millions of user devices, then network coverage is extensive, but computing resources are consumed
Solution Approach 1:
The patent extracts the complex connection management logic from individual user devices and centralizes it in the serving gateway. Each user device only needs to send simple connection requests, while the SGW handles the computationally intensive tasks of priority-based PDN selection and connection establishment. This extraction of management functions to a centralized entity reduces the computing burden on each device and enables scalable deployment across millions of users.
Solution Approach 2:
The serving gateway is designed as a universal entity that handles connection management for all user devices in the network. Rather than each device having its own connection management logic, the single SGW performs this function for the entire network, achieving economies of scale and reducing total computing resource consumption.
Data Source
AI summary
A serving gateway device (SGW) can cause establishment of a requested connection to a first PDN for a user device. The SGW can cause suspension of the connection to the first PDN and establishment of a requested connection to a second PDN for the user device based on a requested connection to a second PDN for a user device. The SGW can cause termination of the connection to the second PDN based on the respective end time associated with the second PDN, and cause restoration of the connection to the first PDN after the connection to the second PDN is terminated.