Multi-SIM Paging Collision Resolution via Network Segmentation
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Solution Overview
Problem
Current multi-SIM operations in cellular wireless communication networks face challenges with paging collisions, particularly when a user equipment (UE) is registered to multiple networks, leading to overlapping paging occasions, resulting in missed pages and degraded user experience due to the lack of standardized support and predictable UE behaviors.
Innovation Solution
A method and UE implementation that register to multiple networks, detect paging collisions, and initiate a paging collision resolution procedure by selecting a network to resolve the collision, either by altering monitoring priorities, applying new paging parameters, or shifting paging occasions, ensuring efficient page reception from both networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE is registered to multiple networks for multi-SIM operation, then the versatility and adaptability of the device is improved, but paging collisions occur leading to missed pages and degraded user experience
Solution Approach 1:
The network performs preliminary actions by configuring dedicated paging occasions and parameters for each SIM before collisions occur. The network proactively assigns different paging frames and occasions to different networks, preventing collisions before they happen. This includes configuring paging parameters such as nB, T, and PO offsets in advance for each SIM card's registered network.
Solution Approach 2:
The paging resource space is segmented and allocated separately for different SIM cards and their respective networks. Each SIM is assigned dedicated paging occasions (PO) and paging frames (PF) that do not overlap with other SIMs. This segmentation of paging resources ensures that pages for different SIMs are received at different times, eliminating collisions while maintaining multi-SIM functionality.
2Ease of operation
If standardization of multi-SIM operations is implemented, then the ease of operation and predictability of UE behavior is improved, but device complexity increases due to multiple network registrations and collision resolution procedures
Solution Approach 1:
The UE autonomously manages its multi-SIM operations by automatically detecting potential paging collisions and initiating resolution procedures without requiring manual intervention. The device self-configures paging parameters, selects appropriate paging occasions, and manages multiple network registrations independently, making the complex multi-SIM operation transparent to the user while maintaining predictable behavior.
Solution Approach 2:
The patent employs standardized parameter configurations for paging operations in multi-SIM devices. Specific parameters such as paging frame offsets, paging occasion indices, and DRX cycle lengths are standardized and adjusted based on SIM configuration. This parameter-based approach provides a systematic method for managing multi-network registrations, making the device behavior predictable while handling the complexity through configurable parameters rather than hard-coded logic.
3Reliability
If paging collision resolution procedures are initiated, then the reliability of page reception is improved, but the loss of time occurs due to collision detection and resolution overhead
Solution Approach 1:
The network performs preliminary configuration of paging parameters and occasions before collisions occur, establishing a collision-free paging schedule in advance. By pre-configuring different paging frames and occasions for different SIMs, the system eliminates the need for time-consuming collision detection and resolution procedures, thus maintaining high reliability without time loss.
Solution Approach 2:
The UE efficiently skips through potential collision scenarios by using pre-configured paging parameters that are designed to avoid overlaps. The device rapidly determines its paging occasions based on standardized formulas using its identity and configured parameters, allowing it to jump directly to the correct non-colliding paging occasion without extensive detection or resolution procedures, thereby minimizing time overhead.
Data Source
AI summary
A user equipment and a method for a multi-Subscriber Identity Module (multi-SIM) operation are provided. The method includes registering to a first network associated with a first Subscriber Identity Module (SIM) and a second network associated with a second SIM; determining whether a paging collision associated with the first network and the second network is detected; and initiating a paging collision resolution procedure associated with a selected network to resolve the paging collision after the paging collision is detected, where the selected network is the first network or the second network.