Gateway Load Selection Using APN Capacity Data
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Solution Overview
Problem
Current methods for selecting a network access gateway node in wireless communication networks fail to achieve balanced load distribution and efficient resource allocation when establishing PDN connections, leading to potential overload and underutilization of resources due to lack of APN-level load information.
Innovation Solution
A method where the mobility management node receives APN capacity allocation and load information from network access gateway nodes, combined with weight factor information from a Domain Name Server, to calculate and select the most suitable gateway node based on effective load, ensuring balanced load sharing across available nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If gateway selection is based on total load only, then the selection process is simple, but load distribution is unbalanced and resources are inefficiently allocated
Solution Approach 1:
The patent segments the load information into two distinct dimensions: total load (all PDN connections) and APN-specific load (only connections to a particular APN). This segmentation allows the gateway selection process to consider both overall gateway capacity and specific APN capacity, resolving the contradiction by adding necessary detail without fundamentally complicating the selection mechanism.
Solution Approach 2:
The patent introduces a new dimension to gateway selection by adding APN-level load information alongside the existing total load metric. This dimensional expansion enables more precise gateway selection that accounts for both overall load and APN-specific load characteristics, improving load distribution efficiency while maintaining selection process simplicity.
2Measurement precision
If APN-level load information is collected from all gateways, then load distribution accuracy improves, but information overhead and processing complexity increase
Solution Approach 1:
The patent applies partial action by collecting APN-level load information only for the specific APN being served, rather than requiring complete load information for all APNs from all gateways. This selective information collection achieves sufficient accuracy for the current selection task while minimizing information overhead and processing requirements.
3Speed
If gateway capacity is not considered in selection, then the selection process is faster, but resource allocation becomes inefficient with potential overload
Solution Approach 1:
The patent changes the parameters used in gateway selection from a single total load metric to multiple parameters including total load and APN-specific load. By incorporating capacity information as a selection criterion, the system achieves both fast selection and efficient resource allocation, as the capacity-aware selection quickly identifies suitable gateways without requiring complex multi-step evaluation processes.
Data Source
AI summary
A mobility management node (e.g., MME) for selecting a network access gateway node (e.g., PGW) when establishing a PDN connection for a radio terminal to a PDN identified by an APN, which mobility management node is configured to operatively manage the mobility for the radio terminal and which access gateway node is configured to operatively act as a network access gateway to the PDN so as to provide connectivity for the radio terminal to the PDN.