Mobile Terminal Network Selection Using Duplex Mode Comparison Table
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Solution Overview
Problem
Conventional mobile terminals supporting multiple duplex modes face inefficiencies in network selection, leading to slower speeds and increased power consumption due to the lack of specified duplex modes in the PLMN list, requiring them to try both FDD and TDD modes for each PLMN.
Innovation Solution
A method for mobile terminals that involves selecting a PLMN and corresponding RAT type from a list, using a comparison table to determine the supported duplex mode for network selection, and updating the table based on successful selections to prioritize efficient duplex mode usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mobile terminal tries both FDD and TDD modes for each PLMN to ensure network selection, then network selection reliability is improved, but network selection speed deteriorates and power consumption increases
Solution Approach 1:
The patent introduces a comparison table that is pre-filled with PLMN information including duplex mode preferences before network selection occurs. This preliminary preparation allows the terminal to directly query the appropriate duplex mode during network selection without needing to test both FDD and TDD modes, thereby maintaining reliability while significantly improving selection speed and reducing power consumption.
Solution Approach 2:
The comparison table serves as an intermediary data structure between the PLMN list and the network selection process. It mediates the selection by providing pre-determined duplex mode information, eliminating the need for the terminal to blindly test both duplex modes and thus resolving the contradiction between reliability and speed.
2Reliability
If a mobile terminal tries both FDD and TDD modes for each PLMN to ensure network selection, then network selection reliability is improved, but power consumption increases
Solution Approach 1:
The comparison table is pre-configured with duplex mode preferences for various PLMNs before network selection occurs. This preliminary action eliminates the need for the terminal to perform exhaustive testing of both FDD and TDD modes during actual network selection, significantly reducing power consumption while maintaining reliable network selection through the pre-determined preferences.
Solution Approach 2:
The comparison table acts as an intermediary that stores pre-determined duplex mode information, allowing the terminal to quickly query the appropriate mode without energy-intensive testing. This intermediary structure resolves the contradiction by providing reliable selection guidance with minimal power consumption.
3Device complexity
If the PLMN list contains only PLMN and RAT type information without duplex mode specification, then device complexity is reduced, but network selection efficiency deteriorates
Solution Approach 1:
The patent segments the network selection information into two separate structures: the PLMN list (containing basic PLMN and RAT type information) and the comparison table (containing duplex mode preferences). This segmentation allows the PLMN list to remain simple while the comparison table handles the duplex mode specifics, improving selection efficiency without significantly increasing overall system complexity.
Solution Approach 2:
The comparison table serves as an intermediary structure that bridges the simple PLMN list and the network selection process. It adds duplex mode information in a separate, organized manner, allowing efficient selection without complicating the basic PLMN list structure.
Data Source
AI summary
A method for selecting a network, including: selecting, from a Public Land Mobile Network (PLMN) list of a mobile terminal, a PLMN and a corresponding Radio Access Technology (RAT) type, and performing network selection, wherein the PLMN list contains a PLMN number and a RAT type corresponding to the PLMN. The network selection may include: searching in a comparison table if the selected RAT type corresponding to the PLMN is supported by the mobile terminal, wherein the comparison table contains a PLMN number, a RAT type corresponding to the PLMN, and a duplex mode corresponding to the PLMN and the RAT type; and selecting a network according to a duplex mode which corresponds to the selected PLMN and the selected RAT type, if the selected PLMN and the selected RAT type are contained in the comparison table. The speed of network selection is increased greatly, and power consumption is lowered.