NBIFOM Mode Information in Multi-Access PDN Connection Establishment
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Solution Overview
Problem
The Network-based IP Flow Mobility (NBIFOM) specification does not provide a detailed procedure for establishing a multi-access PDN connection, including successful and failure procedures, and lacks clarity on acceptance and rejection mechanisms from the network for terminal devices supporting NBIFOM functions.
Innovation Solution
A terminal device, Mobility Management Entity (MME), and Packet Data Network (PDN) Gateway (PGW) are configured to transmit and receive messages indicating a Network-based IP Flow Mobility (NBIFOM) mode, enabling a clear communication control procedure for multi-access PDN connection establishment, including Activate default EPS bearer context requests and create session responses with NBIFOM mode information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If NBIFOM function is supported for multi-access PDN connection, then network functionality and communication control are improved, but specification completeness and procedural clarity deteriorate
Solution Approach 1:
The patent applies preliminary action by pre-defining the NBIFOM mode information element structure and its possible values (allowed/not allowed) in the specification. This advance preparation ensures that when multi-access PDN connection establishment is requested, both terminal and network equipment can immediately understand and process the NBIFOM mode without ambiguity, thus maintaining procedural clarity while supporting enhanced network functionality.
2Loss of information
If detailed procedures for multi-access PDN connection establishment are added, then procedural clarity is improved, but specification complexity increases
Solution Approach 1:
The patent extracts the NBIFOM mode indication as a separate, dedicated information element within the existing PDN connection establishment message structure. By isolating this specific function into its own element with clearly defined values (allowed/not allowed), the patent provides procedural clarity for NBIFOM handling without unnecessarily complicating the overall specification structure. This modular approach allows the NBIFOM functionality to be added independently of other PDN connection parameters.
Data Source
AI summary
Provided is communication control accompanied with establishment of a multi-access PDN connection or with rejection of establishment of a multi-access PDN connection, based on a response to a PDN connection establishment request from a terminal device. This makes it possible to provide a communication control method and the like accompanied with a multi-access PDN connection establishment request from the terminal device.