Portable Terminal 4G LTE Network Access via Pre-stored Neighbor Cell Data
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Solution Overview
Problem
Portable terminals cannot connect to a 4G LTE network when the 2G or 3G network they are subscribed to does not provide neighbor cell information, leading users to believe there is a problem with the terminal despite being within the LTE network's coverage area.
Innovation Solution
The portable terminal uses pre-stored neighbor cell information to perform measurements and connect to the 4G LTE network when necessary information is not received from the 2G or 3G network, allowing access even when LTE neighbor cell information is absent in received messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the portable terminal relies on neighbor cell information received from the 2G or 3G network to connect to the 4G LTE network, then the terminal can maintain compatibility with legacy networks, but the terminal cannot access the 4G LTE network when the 2G or 3G network does not provide updated neighbor cell information
Solution Approach 1:
The terminal performs measurements on 4G LTE neighbor cells in advance using pre-stored cell information before attempting to connect to the 4G network. This preliminary measurement action allows the terminal to prepare connection parameters ahead of time, so when the terminal needs to switch to 4G network, it can immediately use the pre-measured cell information without waiting for updates from the 2G/3G network.
Solution Approach 2:
Pre-stored neighbor cell information acts as an intermediary between the legacy 2G/3G network and the 4G LTE network. When the terminal cannot obtain updated neighbor cell information from the 2G/3G network, this intermediary stored information enables the terminal to still perform measurements and connect to the 4G network, bridging the information gap between different network generations.
2Reliability
If the portable terminal performs measurements based on pre-stored neighbor cell information, then the terminal can access the 4G LTE network without updated information from 2G/3G networks, but the terminal requires additional memory storage capacity
Solution Approach 1:
The patent extracts only the essential neighbor cell information parameters needed for 4G LTE network measurement and connection from the complete network information set. By taking out only the critical elements (cell IDs, frequency information, and basic measurement parameters) rather than storing complete network configurations, the terminal achieves reliable 4G access while minimizing memory storage requirements.
3Loss of information
If the portable terminal continuously monitors for neighbor cell information updates from the 2G or 3G network, then the terminal can maintain accurate network information, but the terminal cannot connect to the 4G LTE network when updates are not provided
Solution Approach 1:
The terminal performs measurement actions in advance using pre-stored information, eliminating the need to wait for information updates from the 2G/3G network. This preliminary measurement ensures that the terminal has the necessary data to connect to 4G LTE without continuously monitoring for updates, thus preventing information loss while maintaining connection reliability.
Data Source
AI summary
An apparatus and method for connecting with a network in a portable terminal includes performing measurement on a neighbor cell supporting a first network based on pre-stored neighbor cell information for the first network if neighbor cell information for the first network is not received over a second network when the portable terminal tries to access the first network while camping in the second network.