Terminal Simultaneous PLMN and NPN Access via Supported List
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Solution Overview
Problem
Existing wireless communication systems face challenges in enabling terminals to simultaneously access multiple networks, particularly when transitioning between public land mobile networks (PLMNs) and non-public networks (NPNs), while ensuring quality of service (QoS) based on service level agreements (SLAs).
Innovation Solution
A method and apparatus for a terminal to establish a connection with a PLMN, determine simultaneous access to the PLMN and NPN, and transmit indication information to the NPN for simultaneous access. The terminal receives supported PLMN list information from the NPN and accesses the NPN through a packet data unit (PDU) session of the PLMN, with the supported PLMN list determined based on QoS support according to an SLA between the PLMN and NPN.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a terminal simultaneously accesses PLMN and NPN, then service diversity and network flexibility are improved, but network complexity and access control difficulty increase
Solution Approach 1:
The patent introduces a supported PLMN list as an intermediary mechanism that mediates between the terminal's access requests and the network's QoS requirements. The network uses this list to filter and validate PLMN access requests, ensuring that only networks meeting SLA-based QoS criteria are allowed, thus managing complexity while enabling flexible multi-network access.
Solution Approach 2:
The patent changes the access control parameter from binary PLMN/NPN selection to a QoS-based supported PLMN list evaluation. By transforming the access decision criterion into a QoS parameter verification process, the system achieves more intelligent and flexible network selection while maintaining manageable complexity through standardized QoS parameters.
2Reliability
If QoS is enforced based on SLA between PLMN and NPN, then service quality is improved, but access procedure complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing and maintaining a supported PLMN list that reflects the QoS capabilities and SLA agreements between the network and terminal. This pre-computed list eliminates the need for real-time QoS negotiation and verification during access procedures, thereby ensuring QoS reliability while reducing procedural complexity.
Solution Approach 2:
The patent uses the supported PLMN list as a copied and pre-processed version of the complex QoS verification process. Instead of performing full QoS analysis during each access decision, the system uses the pre-generated supported PLMN list as a simplified reference, maintaining QoS guarantees while significantly reducing access procedure complexity.
3Measurement precision
If terminal determines simultaneous access based on supported PLMN list, then access accuracy is improved, but information exchange complexity increases
Solution Approach 1:
The patent extracts the essential information needed for access decision-making into the supported PLMN list. By separating and pre-computing the QoS validation logic into this list, the terminal can make accurate access decisions using only the list contents rather than requiring complex real-time information exchange, thereby improving accuracy while reducing information overhead.
Solution Approach 2:
The supported PLMN list is generated in advance through preliminary QoS capability exchange between terminal and network. This pre-computed list contains only the essential information needed for access decisions, eliminating the need for repeated complex information exchange during subsequent access procedures while maintaining high decision accuracy.
Data Source
AI summary
The present disclosure may provide a method of operating a terminal based on a plurality of networks in a wireless communication system. Herein, the method of operating the terminal may include establishing a connection with a public land mobile network (PLMN), determining whether or not to simultaneously access the PLMN and non-public networks (NPN), transmitting, to the NPN, indication information indicating a simultaneous access request for the PLMN and the NPN, receiving, from the NPN, supported PLMN list information, and when the connected PLMN is included in the supported PLMN list information, accessing the NPN through a packet data unit (PDU) session of the PLMN. Herein, a supported PLMN list may be a list which is determined according to whether or not a quality of service (QoS) is supported based on a service level agreement (SLA) between the PLMN and the NPN.