Core Network Policy System for Mobile Terminal State Transitions
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Solution Overview
Problem
Current mobile communications systems lack the ability for the core network to proactively control the state transition between the CONNECTED and IDLE states of mobile terminals, leading to an increase in signaling load due to repeated state transitions.
Innovation Solution
A policy determination system is implemented in the core network to control the state transition between CONNECTED and IDLE states of mobile terminals, allowing the core network to determine and notify the radio access network about the optimal timing for these transitions based on specific policies and situations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the core network does not control state transition timing, then the mobile terminal can transition states freely based on its own needs, but the signaling load on the core network increases due to repeated transitions
Solution Approach 1:
The core network pre-determines and notifies the radio access network of optimal state transition timings before the actual transitions occur. This allows the system to prepare for transitions in advance, reducing the need for reactive signaling when transitions actually happen, thereby reducing overall signaling load while maintaining operational flexibility
2Quantity of substance
If the core network implements policy determination for state transitions, then the signaling load is reduced, but the system complexity increases due to additional control mechanisms
Solution Approach 1:
The policy determination system acts as an intermediary between the core network and the radio access network. It receives input from the core network, processes state transition policies, and outputs control decisions to the radio access network. This intermediary structure reduces the signaling burden on the core network while distributing the complexity to a dedicated policy determination component rather than embedding it throughout the entire system
Data Source
AI summary
A policy determination system (500) according to an aspect of the present invention is arranged in a core network (10) and capable of communicating with a control apparatus (100) arranged in a radio access network (20). The control apparatus (100) is configured to perform control related to a state transition between a CONNECTED state and an IDLE state of a mobile terminal (300) based on a state control policy supplied from the policy determination system. The policy determination system (500) includes a policy determination unit (502) that determines a state control policy according to a situation of the mobile terminal (300), and a notification unit (503 or 205) that notifies the control apparatus (100) of the state control policy. This enables, for example, to reduce the number of signalings which are caused due to repetition of state transition (CONNECTED-IDLE transition) of the mobile terminal and are to be processed by the core network, based on the determination by the core network.