Dynamic E-UTRA Reactivation Waiting Period Based on Mobility
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Solution Overview
Problem
The existing methods for managing E-UTRA function in user equipment are inefficient, as they require a fixed waiting period for reactivation after deactivation, which can lead to prolonged service disruptions or unnecessary attempts to connect to a 4G network, affecting user experience.
Innovation Solution
A method where user equipment acquires mobility information to dynamically set a waiting period for deactivating and reactivating the E-UTRA function, allowing for shorter reactivation times based on mobility state, velocity, or change in mobility state, thereby optimizing handover and cell reselection operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed waiting period is used for reactivating E-UTRA function after deactivation, then the system avoids repeated connection attempts to non-functional networks, but the user equipment may experience prolonged service disruption or waste time and power
Solution Approach 1:
The waiting period is changed from a fixed value to a dynamic value that adapts based on network conditions and user equipment state. The system determines the waiting period based on factors such as deactivation cause, mobility state, and network configuration, allowing the reactivation timing to be optimized for each specific scenario rather than using a uniform fixed period
Solution Approach 2:
The waiting period parameter is adjusted based on different conditions and parameters including deactivation cause (network-initiated vs. UE-initiated), mobility state (high, medium, low), and network configuration parameters. This allows the system to select appropriate waiting periods from different ranges or values based on the current operational context
2Device complexity
If a fixed waiting period is used for reactivating E-UTRA function, then the system simplifies the reactivation logic, but it causes time and power wastage from repeated connection attempts
Solution Approach 1:
The waiting period determination is made dynamic by introducing mobility state detection and conditional logic based on deactivation causes. The system monitors mobility state and uses this information to dynamically adjust the waiting period, preventing unnecessary reactivation attempts and associated energy waste while maintaining manageable complexity through structured decision rules
3Reliability
If the waiting period is set too long, then the user equipment avoids repeated connection attempts, but the user experience deteriorates due to prolonged service unavailability
Solution Approach 1:
The waiting period parameter is adjusted based on multiple factors including deactivation cause, mobility state, and network configuration. By changing the parameter dynamically rather than using a fixed value, the system can shorten the waiting period when appropriate (improving user experience) while maintaining sufficient delay when needed (ensuring connection stability)
4Productivity
If the waiting period is set too short, then the user equipment can quickly resume 4G service, but it repeatedly attempts to connect to networks that have previously rejected registration requests
Solution Approach 1:
The waiting period is made dynamic and adaptive based on the deactivation cause and mobility state. When the deactivation was network-initiated or the UE is in high mobility state, a shorter waiting period is applied to enable quick service resumption. When deactivation was UE-initiated or in low mobility state, a longer period is used to avoid repeated rejection attempts, thus balancing productivity and reliability
Data Source
AI summary
In a wireless communication system, when a user equipment needs to deactivate its E-UTRA function due to a network related failure cause, a waiting period is set according to the mobility information of the user equipment. When the waiting period has elapsed after deactivating the E-UTRA function, the user equipment is configured to reactivate the E-UTRA function.