Mobile Terminal Network Access via Pre-downloaded PLMN Data
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Solution Overview
Problem
Mobile communication terminals often take a long time to access public land mobile networks when roaming, affecting user communication experiences.
Innovation Solution
A network access method where a mobile communication terminal downloads shared network information from a server before entering a visited area, adding the visited network's ID to an equivalent PLMN list, allowing for faster network registration upon arrival.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a mobile communication terminal performs traditional network searching in a visited place, then it can eventually access the PLMN, but it takes a long time (tens of minutes) to successfully access the network
Solution Approach 1:
The patent applies preliminary action by having the terminal download shared network information (including VPLMN identifiers) from a shared server before entering the visited place. This pre-acquired information is stored in the terminal's memory and used during network searching, allowing the terminal to quickly identify and register with the visited PLMN without performing lengthy traditional network searches, thus reducing network access time from tens of minutes to seconds
2Productivity
If the terminal downloads and stores shared network information including VPLMN identifiers, then network access speed is significantly improved, but the device complexity increases due to additional memory and data management requirements
Solution Approach 1:
The patent applies universality by using the existing EPLMN list structure, which is already part of the terminal's network management system, to store both home PLMN and visited PLMN identifiers. The terminal's existing memory and data processing capabilities are leveraged to handle the additional visited network information, avoiding the need for separate dedicated storage systems or complex new data management architectures, thus minimizing the increase in device complexity
3Measurement precision
If the terminal uses the EPLMN list to store both home and visited PLMN identifiers, then network matching accuracy is improved, but the loss of information increases due to the need to manage and synchronize multiple network identifiers
Solution Approach 1:
The patent applies feedback by implementing a mechanism where the terminal periodically checks for updates to the shared network information from the shared server and synchronizes its local EPLMN list accordingly. This feedback loop ensures that the terminal maintains accurate and up-to-date visited PLMN identifiers, preventing information loss or desynchronization between the terminal's stored data and the current network environment
Data Source
AI summary
An embodiment of the present disclosure provides a network access method, including transmitting a request for acquiring shared network information to a shared server if a mobile communication terminal detects that a network identification of a PLMN of a visited place does not exist in a local memory of the mobile communication terminal; receiving the shared network information which the shared server transmits in response to the request, and acquiring the network identification of the PLMN of the visited place from the shared network information; adding the network identification of the PLMN of the visited place to an EPLMN list by the mobile communication terminal; and accessing a network according to the EPLMN list.