CIoT 5GS Registration and PDU Mapping Across EPS Handovers
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Solution Overview
Problem
The implementation of Cellular IoT (CIoT) functions in the 5G System (5GS) is unclear when network slices are supported, and the mapping of PDN connections associated with CIoT functions during handovers between the EPS and 5GS is not defined.
Innovation Solution
A user equipment (UE) with a controller, transmission and/or reception unit, and storage unit, receives information indicating control plane CIoT 5GS optimization, stores Single Network Slice Selection Assistance Information (S-NSSAI), and transmits configuration information for PDU session establishment to enable CIoT functions in the 5GS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If network slices are introduced in 5GS to provide diverse services, then service versatility is improved, but system complexity increases
Solution Approach 1:
The network is segmented into multiple network slices, each tailored for specific service requirements (e.g., enhanced mobile broadband, ultra-reliable low-latency communication, massive machine type communications). This segmentation allows diverse services to operate independently with optimized parameters without increasing overall system complexity, as each slice is managed separately with defined boundaries and resources.
Solution Approach 2:
The 5GS core network and radio access network are designed with multi-functionality to support both traditional mobile services and CIoT-specific services through the same infrastructure. The system can dynamically allocate resources to different network slices based on service requirements, enabling a single system to fulfill multiple functions without proportionally increasing complexity.
2Adaptability or versatility
If CIoT functions are implemented in 5GS with network slices, then IoT service capability is improved, but clarity of implementation and connection mapping becomes uncertain
Solution Approach 1:
The patent introduces an intermediary mapping mechanism that translates between EPS PDN connection parameters and 5GS PDU session parameters. This intermediary layer handles the complexity of mapping relationships, providing clear implementation guidelines for handover scenarios while maintaining IoT service capability across network generations.
Solution Approach 2:
The patent establishes preliminary mapping rules and procedures for CIoT function implementation before actual handover operations occur. By pre-defining how PDN connections map to PDU sessions and how CIoT optimization parameters are transferred, the implementation clarity is improved ahead of time, reducing uncertainty during actual deployment.
Data Source
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AI summary
A communication unit for implementing an operation for CIoT in 5GS and a communication unit for mapping a connection associated with the function for CIoT to an appropriate connection in a handover between the 5GS and EPS are provided. Even in the 5GS supporting a network slice, a communication unit for allowing the operation for CIoT to be used is provided. Furthermore, a communication unit for mapping a PDN connection associated with the operation for CIoT and established in the EPS to an appropriate PDU session in a handover of user equipment from the EPS to the 5GS is provided. Furthermore, a communication unit for mapping a PDU session established in the 5GS to an appropriate PDN connection in the handover of the user equipment from the 5GS to the EPS is provided.