Mobile Terminal System Information Reception and Validity Determination
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Solution Overview
Problem
Mobile communication terminals face challenges in receiving essential system information when system information changes before they can obtain SIB2, leading to inability to recognize system information changes and potentially designating cells as barred.
Innovation Solution
A method and apparatus for a mobile communication terminal to continuously receive system information until its validity is determined, using SIB1 scheduling information and paging message reception, and re-receiving MIB and SIB1 if validity is not determinable, ensuring all essential system information is obtained for camp-on and system information change detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal receives system information based on scheduling information from SIB1, then the terminal can obtain system information efficiently, but if system information changes before SIB2 is received, the terminal cannot recognize the change and may incorrectly designate the cell as barred
Solution Approach 1:
The terminal performs preliminary reception of system information using scheduling information from SIB1 before SIB2 is received. The terminal proactively attempts to receive MIB and SIB1 multiple times in advance, preparing system information reception before the complete information chain (including SIB2) is established, thereby preventing cell barring due to timing mismatches
Solution Approach 2:
The terminal implements a feedback mechanism where it continuously monitors whether system information validity can be determined. When validity determination fails (indicating system information change), the terminal triggers re-reception of MIB and SIB1, creating a closed-loop system that adapts to system information changes dynamically
2Reliability
If the terminal continuously receives system information to determine validity, then the terminal can detect system information changes, but the terminal increases reception attempts and processing overhead
Solution Approach 1:
The reception control mechanism is made dynamic by adjusting reception behavior based on validity determination results. The terminal transitions between different reception states: normal reception when validity is determinable, and intensive re-reception when validity cannot be determined, allowing the system complexity to adapt to actual needs rather than operating at maximum complexity continuously
Solution Approach 2:
The terminal autonomously determines whether system information validity can be assessed and self-regulates its reception behavior accordingly. When the terminal detects that validity determination is not possible, it automatically initiates re-reception of MIB and SIB1 without external intervention, making the system self-managing and reducing the need for complex external control mechanisms
Data Source
AI summary
An apparatus and a method for receiving system information in a mobile communication terminal are provided. In the method, system information including scheduling information for at least one additional system information is received from a base station. Whether validity of the system information is determinable is determined. If it is determined that the validity of the system information is not determinable, system information including scheduling information for at least one additional system information is received again from the base station.