LTE Network Return via Signal Strength Measurement
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Solution Overview
Problem
Existing methods for mobile user equipment to return to an LTE network from a 2G/3G network either experience long delays due to Cell Reselection or require costly upgrades for Fast Return, and can fail due to unsuitable target LTE neighbor cell information, leading to inefficient transitions.
Innovation Solution
A packet-switched network return procedure is implemented by mobile user equipment, which measures signal strength of available LTE access points from provided lists and reconnects to the LTE network based on measured strengths, bypassing the need for costly upgrades and ensuring efficient reconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If Cell Reselection method is used for network return, then the method is simple and compatible with existing infrastructure, but the reconnection delay is long
Solution Approach 1:
The patent applies preliminary action by having the mobile terminal measure and evaluate signal strengths of LTE access points while still connected to the 2G/3G network, before actually returning to LTE. This advance preparation allows the terminal to have ready-to-use connection information, eliminating the need for lengthy cell reselection procedures after network return and significantly reducing reconnection delay.
2Loss of time
If Fast Return method is used for network return, then the reconnection speed is fast, but costly infrastructure upgrades are required
Solution Approach 1:
The patent implements self-service by enabling the mobile terminal to autonomously measure signal strengths, evaluate LTE access point suitability, and initiate network return without requiring network-side coordination or infrastructure upgrades. The terminal independently performs all necessary functions, achieving fast return capability through device-side intelligence rather than expensive network infrastructure modifications.
3Loss of time
If Fast Return is used, then reconnection is fast, but the procedure can fail due to unsuitable target LTE neighbor cell information
Solution Approach 1:
The patent applies feedback by having the mobile terminal measure actual signal strengths of LTE access points and use this measured information to determine whether to proceed with network return. The terminal receives feedback from the network about available LTE access points, measures their signal strengths, and uses this feedback loop to make an informed decision, ensuring both fast and reliable reconnection by avoiding unsuitable target cells.
Data Source
AI summary
Systems and methods for generating a Long Term Evolution network return procedure. A mobile terminal may generate, in absence of redirection instruction from a circuit-switched network, a Long Term Evolution network return procedure that, when instantiated by the mobile terminal, implements connection of the mobile terminal to a Long Term Evolution network based on measured signal strength of at least one Long Term Evolution network access point.