Standby Radio Access Network Selection for Mobile Stations
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Solution Overview
Problem
The existing mobile communication systems are unable to achieve high-speed connections when a mobile station UE does not support CS communication in the LTE scheme and fail to reduce sending and receiving times for CS communication when equipped with a CSFB function in the WCDMA scheme.
Innovation Solution
A mobile communication method and system that determine the standby radio access technology (RAT) based on the capability information of the mobile station UE, allowing it to perform a standby operation in either a radio access network that provides circuit switch communication or one that offers higher-speed packet switch communication, thereby optimizing connection times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the standby RAT is determined based on contract information of the mobile station UE, then the network can manage subscriber preferences, but it cannot achieve high-speed connection when the UE does not support CS communication in LTE scheme
Solution Approach 1:
The patent changes the determination parameter from contract information alone to a combination of contract information and UE capability information. The mobile switching center now considers both the subscriber's contract preferences and the actual capabilities of the UE (whether it supports CS communication) to determine the standby RAT, enabling high-speed connections for UEs without CS support while maintaining adaptability for those with CSFB capability
Solution Approach 2:
The patent performs preliminary determination of standby RAT based on UE capability information before actual communication occurs. The mobile switching center proactively identifies UEs that do not support CS communication and pre-configures them for LTE standby, avoiding connection delays when such UEs attempt to communicate
2Loss of time
If the standby RAT is determined based on contract information, then network policy control is maintained, but CS communication sending and receiving time cannot be reduced when UE is equipped with CSFB function
Solution Approach 1:
The patent modifies the standby RAT determination by incorporating UE capability information about CSFB support. When the mobile switching center identifies that a UE supports CSFB communication, it can determine WCDMA as the standby RAT, enabling the UE to utilize CSFB functionality and thereby reduce CS communication time through faster fallback mechanisms
Solution Approach 2:
The patent introduces feedback from UE capability information to the standby RAT determination process. The mobile switching center receives capability information from the UE and uses this feedback to dynamically adjust the standby RAT selection, optimizing CS communication performance for CSFB-capable devices
Data Source
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AI summary
A mobile communication method according to the present invention comprising the subscriber management server device HSS determines either the radio access network of the WCDMA scheme or the radio access network of the LTE scheme as the standby radio access network of the mobile station UE based on the CSFB capability presence/absence information included in the received "Update GPRS Location/Update Location Request" of received the mobile station UE, and a step in which the mobile station UE performs the standby operation in the standby radio access network of the mobile station UE determined by the subscriber management server device HSS.