Multi-USIM MA PDU Sessions Across Different PLMNs
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Solution Overview
Problem
Current wireless communication systems do not support Multi-Access Protocol Data Unit (MA PDU) sessions over two 3GPP accesses with different Public Land Mobile Networks (PLMNs) for multi-USIM devices, limiting their ability to benefit from concurrent network access and adaptability to varying Quality of Service (QoS) constraints.
Innovation Solution
A system is provided to establish MA PDU sessions over two 3GPP accesses via different PLMNs associated with respective USIMs of a MUSIM device, involving a capability indication during registration, network support confirmation, and selection of an anchor PLMN for concurrent data communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multi-USIM devices establish separate PDU sessions for each PLMN, then network access capability is improved, but session management complexity increases
Solution Approach 1:
The patent combines multiple separate PDU sessions (first PDU session in first PLMN, second PDU session in second PLMN) into a single unified MA PDU session. This merging allows the device to maintain concurrent network access to multiple PLMNs while managing sessions through a single unified structure, thereby reducing session management complexity while preserving network access capability.
Solution Approach 2:
The MA PDU session is designed to serve multiple functions simultaneously - it provides connectivity to both the first PLMN and second PLMN through a single session structure. This multi-functional approach allows the session to adapt to different network scenarios and QoS requirements while maintaining a unified management framework.
2Adaptability or versatility
If MA PDU sessions are established over different PLMNs, then adaptability to QoS constraints is improved, but system compatibility challenges increase
Solution Approach 1:
The patent applies local quality by allowing different QoS characteristics to be assigned to different PDU sessions within the MA PDU session structure. The first PDU session can have QoS parameters optimized for the first PLMN, while the second PDU session can have QoS parameters optimized for the second PLMN, enabling adaptability to varying QoS constraints while maintaining overall session compatibility.
3Adaptability or versatility
If concurrent network access is enabled, then communication flexibility is improved, but device complexity increases
Solution Approach 1:
The patent merges concurrent network access functionality into a unified MA PDU session structure. Instead of managing separate PDU sessions for each PLMN independently, the device uses a single MA PDU session that encompasses both connections, thereby enabling communication flexibility while reducing the complexity of managing multiple concurrent sessions.
Data Source
AI summary
Aspects are provided which allow an MA PDU session to establish over two 3GPP accesses respectively via different PLMNs associated with respective USIMs of a MUSIM device. During registration, the MUSIM UE may transmit a registration request to a base station of a first PLMN indicating a UE capability for a MA PDU session associated with a MUSIM device. The MA PDU session includes a plurality of PDU sessions associated with a single access type. Afterwards, the UE may transmit a PDU session establishment request for a first PDU session of the PDU sessions in the first PLMN and for a second PDU session of the PDU sessions in a second PLMN, where the first PLMN is associated with a first USIM of the UE, and the second PLMN is associated with a second USIM of the UE. Consequently, MA PDU sessions associated with MUSIM devices may be established.