RRC Light Connected State Signaling Reduction
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Solution Overview
Problem
The increasing frequency of radio terminal connections and paging requests in mobile communication systems leads to increased network signaling load, necessitating efficient methods to reduce signaling while maintaining S1 connections.
Innovation Solution
A base station and mobility management entity system that transitions radio terminals to a 'Light Connected' state with suppressed signaling, allowing for reduced signaling while maintaining S1 connections, and sends paging requests and messages to manage downlink data and NAS signaling effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radio terminals frequently connect to the network and paging is executed, then network responsiveness and service availability are improved, but signaling load on the network increases
Solution Approach 1:
The patent introduces a new radio resource control state called 'RRC light connection' which changes the parameter of connection state from binary (connected/idle) to a three-state model (light connection/connected/idle). This intermediate state reduces signaling load by suppressing unnecessary signaling while maintaining S1 connections, thereby resolving the contradiction between network responsiveness and signaling load.
2Quantity of substance
If signaling for radio terminals is suppressed, then signaling load is reduced, but network management capability deteriorates
Solution Approach 1:
The patent segments the connection states into three distinct levels: RRC light connection, RRC connected, and RRC idle. Each state has specific signaling characteristics and management requirements. This segmentation allows the network to apply different management strategies to different states, reducing overall signaling load while maintaining appropriate management capability for each state through targeted control mechanisms.
Data Source
AI summary
A base station causes a radio terminal to transition to a specific state. The specific state is a state in which signaling for the radio terminal is suppressed compare to an RRC connected state while a connection for the radio terminal is maintained between the base station and a core network. The base station transmits to an entity of the core network, an identifier identifying the radio terminal and a first RRC transition notification indicting that the radio terminal transitions from the RRC connected state to the specific state. The base station causes the radio terminal to transition from the specific state to the RRC connected state. The base station transmits to the entity, a second RRC transition notification indicting that the radio terminal transitions from the specific state to the RRC connected state.