Ultrafast Cell Selection Using Stored Ever-Camped Data

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The existing cell selection procedures in wireless devices often result in delays due to events like power cycle, interface switching, and network searches, negatively impacting user experience.

Innovation Solution

Implementing an ultrafast cell selection method where a wireless device uses stored information about ever-camped and ever-detected cells to directly select cells, reducing search and decoding times by utilizing frequency, PCI, MIB, and SIB data, and calculating timing synchronization information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the device performs complete cell selection procedure (cell search, MIB decoding, SIB decoding) for each event, then the cell selection reliability is ensured, but the cell selection time increases causing user experience degradation

Engineering Contradiction:

Improvecell selection reliabilityVSAvoidcell selection time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The device performs cell search, MIB decoding, and SIB decoding in advance before events occur, storing the results in memory. When an event triggers cell selection, the device directly uses the pre-obtained information to quickly identify and select a suitable cell, avoiding repeated decoding operations and significantly reducing cell selection time while maintaining reliability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The device creates and stores copies of cell information (PCI, frequency, MIB, SIB) in memory after initial detection and decoding. These stored copies are then reused during cell selection events, eliminating the need to redecode system information blocks and reducing the cell selection process to simple information retrieval and comparison

Inventive Principle:

Principle #26Copying

2Speed

If the device stores detailed information about ever-camped and ever-detected cells, then the cell selection speed improves, but the device memory requirements increase

Engineering Contradiction:

Improvecell selection speedVSAvoidstored information quantity

Core Design Contradiction:

SpeedVSQuantity of substance

Solution Approach 1:

The device extracts and stores only the essential cell selection parameters (PCI, frequency, MIB, SIB) from complete cell information. By taking out only the critical elements needed for cell selection rather than storing all cell details, the device achieves fast cell selection while minimizing memory consumption

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The device stores different types of cell information with different retention policies and detail levels. Ever-camped cells store complete information including MIB and SIB, while ever-detected cells store only essential parameters like PCI and frequency. This localized quality differentiation optimizes memory usage by storing detailed information only where necessary for fast reselection

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20230309010A1Ultrafast Cell Selection In A Wireless Device

Publication Date: 2023.09.28 MEDIATEK INC

AI summary

Various pertaining to ultrafast cell selection in a wireless device are described. An apparatus stores information related to at least one of: (a) one or more ever-camped cells having been camped on by the apparatus previously, and (b) one or more ever-detected cells having been detected by the apparatus previously. The apparatus performs a cell selection procedure using the stored information responsive to occurrence of an event, thereby reducing cell search time, master information block (MIB) decoding time and system information block (SIB) decoding time.