SBI Session Parameter Recovery for Reliable 5G Session Setup
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G cellular networks, session attach failures occur due to missing session parameters in service-based interface messages, degrading customer experience and network performance.
Innovation Solution
A failure handler determines a value for missing session parameters using pre-configured mapping tables, allowing the establishment of user plane sessions by filling in the missing parameters, thereby continuing the session setup process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the network node strictly validates mandatory parameters in SBI messages, then message processing accuracy is improved, but session establishment reliability deteriorates when parameters are missing
Solution Approach 1:
The patent pre-configures mapping tables that associate QoS identifiers with their corresponding mandatory parameters (ARP, bandwidth, etc.) before session establishment. When a message is received, the system proactively checks for missing parameters and automatically fills them using the pre-configured mappings, preventing session failure due to incomplete parameters
Solution Approach 2:
The patent introduces mapping tables as an intermediary mechanism between the received SBI message and the session establishment process. These tables serve as a bridge that provides default values for missing parameters, allowing the system to maintain both validation rigor and session reliability by mediating between incomplete input data and required processing
2Reliability
If the network node automatically fills missing parameters, then session establishment reliability is improved, but parameter precision may deteriorate
Solution Approach 1:
The patent applies partial validation by checking only for the presence of critical mandatory parameters (ARP, bandwidth, etc.) rather than validating all parameters. When parameters are missing, the system fills them with default values from mapping tables, accepting that these filled values may not be as precise as explicitly provided values, but ensuring session establishment proceeds
Solution Approach 2:
The patent uses default parameter values from mapping tables as temporary substitutes for missing parameters. These default values serve their purpose of enabling session establishment but may be replaced or updated if more accurate values become available later, accepting lower precision in exchange for session reliability
3Measurement precision
If the network node rejects messages with missing parameters, then message processing accuracy is improved, but network performance deteriorates due to session attach failures
Solution Approach 1:
The patent converts the potentially harmful condition of missing parameters into a beneficial outcome by using the absence of parameters as a trigger to apply pre-configured mappings. This transforms what would normally be a rejection condition into an opportunity to apply standardized defaults, improving both processing efficiency and session establishment success rates
Data Source
AI summary
Solutions are disclosed that provide failure handling for missing session parameters in wireless network messaging. When a service-based interface (SBI) message received by a control plane node, such as a session management function (SMF), is missing a session parameter (e.g., allocation and retention priority (ARP) or bandwidth value), rather than responding with a rejection, failure handling fills in the missing parameter using pre-configured tables. The type of received message, along with another parameter in the message, such as a QoS identifier, is used in a mapping table to identify a default value to supply as the missing parameter. This approach may be used in other network messages in which certain parameter values are commonly used together in particular types of messages, such as the given example of QoS identifier, ARP value, and bandwidth value.