Multi-PLMN USIM Paging Handling via Master Network Segmentation
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Solution Overview
Problem
In wireless communication systems, user equipment (UE) with multiple USIMs often miss paging notifications when in RRC_CONNECTED state with one USIM and cannot receive parallel paging from other networks without configuration gaps, or when in RRC_IDLE or RRC_INACTIVE state, leading to paging collisions between USIMs.
Innovation Solution
A method where the UE provides an indication to one network to receive paging notifications for another network via the first network, using a handle and security key, allowing paging notifications to be forwarded through the user plane, and switching the master network role as needed to prevent missed pages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the UE is in RRC_CONNECTED state with one USIM, then the connection stability is improved, but the UE cannot receive parallel paging from other networks
Solution Approach 1:
The patent segments the paging reception function by introducing a master USIM that specifically handles paging notifications from other networks, while the slave USIM maintains its RRC_CONNECTED state for data communication. This segmentation allows the UE to simultaneously maintain connection stability with one network and receive paging notifications from other networks through the master USIM's monitoring of other cells.
Solution Approach 2:
The master USIM acts as an intermediary that receives and forwards paging notifications from other networks to the slave USIM. The master USIM monitors paging occasions in other cells and, upon detecting a paging notification for the slave USIM, sends a notification to the slave USIM, enabling indirect paging reception without disrupting the slave USIM's connected state.
2Use of energy by moving object
If the UE is in RRC_IDLE or RRC_INACTIVE state on all USIMs, then the battery consumption is reduced, but the paging occasions for multiple USIMs may collide
Solution Approach 1:
The patent merges the paging monitoring function for multiple USIMs into a single master USIM. The master USIM consolidates paging occasion monitoring from multiple networks, allowing the UE to remain in RRC_IDLE or RRC_INACTIVE state on all USIMs (reducing power consumption) while still reliably receiving paging notifications from all networks through the master USIM's coordinated monitoring and notification mechanism.
3Reliability
If the UE configures gaps in its connection to receive paging from other networks, then the paging reception capability is improved, but the connection continuity is degraded
Solution Approach 1:
The patent segments the UE's operation into master and slave USIMs with distinct roles. The slave USIM maintains continuous RRC_CONNECTED state for data communication without gaps, while the master USIM is responsible for monitoring paging occasions in other cells. This segmentation eliminates the need to configure connection gaps, as the master USIM's paging monitoring occurs in parallel without interrupting the slave USIM's continuous connection.
Solution Approach 2:
The master USIM serves as an intermediary that handles all paging monitoring tasks, allowing the slave USIM to maintain uninterrupted RRC_CONNECTED state. The master USIM monitors other cells during periods that do not conflict with the slave USIM's data transmission, acting as a mediator that enables paging reception without creating gaps in the primary data connection.
Data Source
AI summary
There is provided an apparatus, said apparatus comprising at least one processor and at least one memory including a computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus at least to: at a user equipment, the user equipment having a first universal subscriber identity module, USIM, associated with a first network and at least one second USIM associated with a second network, provide an indication from the at least one second USIM to the second network that paging notifications for the second network are to be provided to the first USIM of the user equipment via the first network, receive a paging notification for the second network at the first USIM of the user equipment via the first network and provide the paging notification from the first USIM to the second USIM in the user equipment.