Shared Cell and PLMN Selection to Reduce WTRU Scanning
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in cell and public land mobile network (PLMN) selection processes, particularly in scenarios where devices lack local selection information or experience failed attempts, leading to increased scanning operations and reduced connectivity performance.
Innovation Solution
Implementing a wireless transmit/receive unit (WTRU) aggregation method where devices share and verify stored selection information, utilizing a coordinator to manage and centralize this data for enhanced cell and PLMN selection, thereby reducing scanning operations and improving connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If devices perform independent cell and PLMN selection without shared information, then each device maintains operational independence, but scanning operations increase and selection efficiency decreases
Solution Approach 1:
The patent merges cell selection information from multiple WTRUs into a centralized repository. When one WTRU needs to perform cell selection, it can query the centralized repository for pre-collected selection information from other WTRUs, thereby reducing the need for extensive scanning operations and improving selection efficiency.
Solution Approach 2:
The patent implements preliminary cell selection information collection by having WTRUs proactively gather and store cell selection data in a centralized repository before other WTRUs need to perform selection. This advance preparation reduces the time required for scanning operations when selection is actually needed.
2Productivity
If devices share stored selection information across the network, then selection efficiency improves, but information validity and reliability become problematic
Solution Approach 1:
The patent implements a feedback mechanism where WTRUs verify the validity of cell selection information retrieved from the centralized repository. The system provides feedback on whether the stored information is still valid (e.g., based on timing or location criteria), and WTRUs can request updates or discard invalid information, thereby maintaining reliability while benefiting from shared data.
Solution Approach 2:
The patent makes the cell selection information dynamic by allowing it to be updated, expired, or refreshed based on current conditions. Information in the centralized repository is not static but can change over time, with WTRUs able to update their stored information and the system adapting to changing network conditions, thus maintaining reliability.
3Productivity
If a coordinator WTRU centralizes aggregated stored information, then selection procedure is boosted and scanning is reduced, but device complexity and coordination overhead increase
Solution Approach 1:
The patent introduces a coordinator WTRU as an intermediary that manages the centralized repository of cell selection information. This coordinator handles the complexity of aggregating, storing, and distributing selection information from multiple WTRUs, thereby simplifying the overall system architecture while boosting selection procedure speed and reducing scanning requirements.
Data Source
AI summary
Systems, methods, and instrumentalities are described herein for wireless transmit/receive unit (WTRU) aggregation-based stored selection information for cell selection and public land mobile network (PLMN) selection. Cell selection may be performed using stored selection information from an aggregated device. PLMN selection may be performed using stored selection information from an aggregated device. WTRUs may aggregate their stored selection information for cell selection sharing and/or PLMN selection sharing, for example, to boost a cell selection procedure and/or reduce scanning operations. Aggregated and/or anchor users may verify the validity of stored selection information. A coordinator WTRU may centralize and/or manage aggregated stored selection information.