Mobile Terminal System Information Acquisition via Local Storage
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Solution Overview
Problem
Mobile terminals face inefficiencies in acquiring system information over the air interface, leading to increased power consumption and time, especially during cell selection, reselection, and handover processes, as they need to constantly read and decode various system information messages from base stations in LTE, UMTS, and GSM networks.
Innovation Solution
A server-based system where mobile terminals store locally obtained system information for proximate cells, allowing them to access this information instead of re-reading it over the air interface, using a database that associates cells and provides system information based on location and cell relationships identified by mobile terminals and GPS data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mobile terminals constantly read and decode system information messages over the air interface, then system information is obtained, but power consumption increases and time is lost
Solution Approach 1:
The system performs preliminary actions by having mobile terminals store system information messages locally after initial reception, and by servers pre-generating and storing system information for proximate cells. When a terminal needs system information, it first checks local storage before accessing the air interface, thereby avoiding repeated transmissions and reducing power consumption while ensuring information availability.
2Reliability
If mobile terminals constantly read and decode system information messages over the air interface, then system information is obtained, but acquisition time increases
Solution Approach 1:
The system performs preliminary actions by having mobile terminals store system information messages locally after initial reception, and by servers pre-generating and storing system information for proximate cells. When a terminal needs system information, it first checks local storage before accessing the air interface, thereby avoiding repeated transmissions and reducing power consumption while ensuring information availability.
Solution Approach 2:
The system creates copies of system information messages by having terminals store local copies of previously received system information and by servers generating copies of system information for proximate cells. These copies enable fast retrieval without requiring continuous air interface access, significantly reducing acquisition time while maintaining information accuracy.
3Use of energy by moving object
If mobile terminals access locally stored system information, then power consumption is reduced, but system complexity increases
Solution Approach 1:
The system introduces a server as an intermediary that centralizes the complex tasks of generating, storing, and managing system information for multiple cells. The server handles the complexity of tracking proximate cells and managing information copies, while terminals only need to perform simple local storage and retrieval operations, thereby reducing terminal complexity while enabling power-efficient information access.
Data Source
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AI summary
A mobile terminal device may include a radio processing circuit configured to transmit communication data indicating a serving cell, the communication data intended for a server and receive system information of one or more proximate cells of the serving cell indicated by the communication data. The mobile terminal device may also include a baseband processing circuit configured to determine if system information of a target cell is included in the received system information of the one or more proximate cells, and, if the system information of the target cell is included in the received system information of the one or more proximate cells, apply the received system information of the target cell to control the radio processing circuit to transmit or receive data.