Selective SIB Reading for Wireless Redirection
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE technology, face challenges in efficiently managing system information block (SIB) messages during radio access technology (RAT) redirection, leading to potential failed redirections and dropped calls due to incomplete or missing frequency information.
Innovation Solution
A method is introduced where user equipment (UE) determines whether to read SIB messages based on the scenario of redirection or normal connection request, selectively reading SIBs to avoid failed redirections and enhance call setup speed, especially in circuit-switched fallback scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the UE reads all SIB messages during RRC connection request, then the frequency information is complete, but the call setup time increases and network performance deteriorates
Solution Approach 1:
The network performs preliminary action by including frequency information in the redirection indication message sent to the UE before the RRC connection request. This allows the UE to have the necessary frequency information ready without needing to read complete SIB messages during the connection setup, thus reducing call setup time while maintaining information completeness.
Solution Approach 2:
The invention extracts only the essential frequency information from the complete SIB messages and includes it in the redirection indication message. This extraction allows the UE to obtain the necessary frequency data without processing the entire SIB message, thereby reducing the time required for call setup while maintaining the required information completeness.
2Productivity
If the UE skips reading SIB messages during redirection, then the call setup speed increases, but failed redirections occur due to missing frequency information
Solution Approach 1:
The network performs preliminary action by including frequency information in the redirection indication message sent to the UE before the RRC connection request. This allows the UE to have the necessary frequency information ready without needing to read complete SIB messages during the connection setup, thus reducing call setup time while maintaining information completeness.
Solution Approach 2:
The invention implements feedback by having the UE indicate in the RRC connection request whether it has been redirected from another RAT. The network uses this feedback information to determine whether to include frequency information in the redirection indication message, ensuring reliable redirection while maintaining fast call setup.
3Loss of information
If the UE reads SIB messages during normal connection request, then the frequency information is complete, but the network resources are wasted
Solution Approach 1:
The invention applies local quality by providing frequency information selectively based on the specific connection scenario. When the UE indicates it has been redirected from another RAT, the network includes frequency information in the redirection indication message. For normal connection requests without redirection, the network does not include this information, thereby saving network resources while maintaining information completeness where needed.
Data Source
AI summary
A method of wireless communication defers measurement control reading of a SIB. The method includes determining whether a user equipment (UE) has been redirected to a first radio access technology (RAT) from a second RAT. The method also includes selectively reading a system information block (SIB) based on whether the UE was redirected to the first RAT from a second RAT.