Mobile Terminal Network Access via EPLMN Pre-Storage
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Solution Overview
Problem
Mobile communication terminals take a long time to connect to a Public Land Mobile Network (PLMN) when a new user identification card is inserted, significantly impacting user communication experience.
Innovation Solution
A method and terminal that determine the supported network standard, add PLMN network identities to an Equivalent Public Land Mobile Network (EPLMN) list, and establish a communication connection with a matching PLMN, thereby enhancing the chances of finding a matching network identity during the initial network search.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal performs a comprehensive network search to ensure finding the correct PLMN, then the reliability of network connection is improved, but the time required for network connection increases significantly
Solution Approach 1:
The terminal performs preliminary actions by pre-storing network identities of equivalent PLMNs (EPLMN list) before the actual network search. When a new SIM card is inserted, the terminal immediately checks the EPLMN list for matching network identities rather than performing a complete network search from scratch. This preliminary preparation significantly reduces connection time while maintaining reliability through the equivalence relationship between PLMNs.
Solution Approach 2:
The terminal creates a copy of network identity information by storing EPLMN (Equivalent Public Land Mobile Network) identities that are equivalent to the home PLMN. Instead of searching for the exact home PLMN every time, the terminal uses these copied equivalent network identities as alternatives, allowing faster connection while maintaining service quality through the equivalence relationship.
2Measurement precision
If the terminal searches all possible networks to ensure finding the home PLMN, then the accuracy of network selection is improved, but the complexity of the network search process increases
Solution Approach 1:
The network search process is segmented into two parts: first, checking the pre-stored EPLMN list for matching network identities, and second, performing a complete network search only if no match is found in the EPLMN list. This segmentation reduces the complexity of the overall process by breaking it down into a simple quick-check phase and a more comprehensive phase that is executed less frequently.
Solution Approach 2:
The terminal performs preliminary action by pre-configuring the EPLMN list with equivalent network identities before the network search is needed. This preliminary setup stores frequently used or equivalent network identities in advance, so when network selection is required, the terminal only needs to check this pre-prepared list rather than analyzing all possible networks, thereby reducing search complexity while maintaining selection accuracy.
Data Source
AI summary
Disclosed are a network access method and a mobile communications terminal. The method comprises: determining a network standard supported by a mobile communications terminal; adding to an equivalent public land mobile network (EPLMN) the network identifier of a public land mobile network (PLMN) of the determined network standard supported by the mobile communications terminal; if a PLMN matching the network identifier of the EPLMN is discovered by searching, then establishing a communications connection between the mobile communications terminal and the matching PLMN.