ISR Deactivation During Inter-RAT Mobility
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing idle mode signaling reduction (ISR) during mobility procedures, particularly when transitioning between different radio access technologies, leading to resource inefficiencies and potential network congestion.
Innovation Solution
A method where user equipment (UE) locally deactivates or ignores ISR when a mobility command, such as a cell change order (CCO), is received, allowing for the initiation of a location management procedure that includes sending update requests to release resources and adapt to new networks, even if ISR is active.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If ISR is activated during mobility procedures, then signaling overhead is reduced, but network resource allocation becomes inefficient and mobility completion is delayed
Solution Approach 1:
The patent implements dynamic control of ISR activation status based on mobility procedure state. The network side determines whether to activate or maintain ISR during mobility procedures by evaluating specific conditions (such as whether the mobility is within the same tracking area or routing area). This dynamic adjustment allows the system to reduce signaling overhead when appropriate while ensuring timely mobility completion when needed, resolving the contradiction between signaling reduction and mobility efficiency.
2Use of energy by moving object
If ISR remains active during inter-RAT mobility, then UE power consumption is reduced, but network resource release is delayed causing congestion
Solution Approach 1:
The patent establishes a feedback mechanism where the network side monitors mobility procedure completion status and actively controls ISR activation. When mobility procedures are initiated, the network can send indications to the UE to deactivate ISR, ensuring timely resource release. This feedback-based control allows the system to balance UE power consumption with network resource management, preventing congestion while maintaining energy efficiency.
3Productivity
If ISR is deactivated during mobility procedures, then network resource allocation efficiency improves, but signaling overhead increases
Solution Approach 1:
The patent applies local quality control by selectively deactivating ISR only in specific scenarios (such as inter-RAT mobility or when crossing tracking area boundaries) while maintaining ISR activation in other scenarios (such as intra-TA mobility). This localized approach ensures network resource allocation efficiency is improved where necessary, while avoiding unnecessary signaling overhead in situations where ISR can remain active.
Data Source
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AI summary
A method, an apparatus, and a computer program product for wireless communication are provided in which a user equipment performs an inter-radio access technology (RAT) mobility procedure from a first network to a second network while idle mode signaling reduction (ISR) is active, locally deactivates (ISR) in connection with completion of the inter-RAT mobility procedure, and initiates a location management procedure in the second network. Depending on the respective type of the first and second network, and the connection state of the (UE) with respect to the first network, the mobility procedure may be performed in response to a mobility command received from the first network, or in response to a mobility condition of the first network as detected by the (UE).