RRC Inactive Dual Connectivity With Periodic Frequency Measurements
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Solution Overview
Problem
In next-generation mobile communication systems, there is a need for an efficient method to switch a terminal between RRC-connected and RRC-inactive modes, particularly for dual-connectivity scenarios, while minimizing power consumption and optimizing signaling procedures, and ensuring secure protocol layer operations.
Innovation Solution
The method involves acquiring configuration information for frequency measurement from a base station, performing measurements in RRC-inactive mode, and transmitting the results through RRC resume messages, with corresponding messages exchanged between the terminal and base station to support seamless transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a terminal switches from RRC-connected mode to RRC-idle mode to save power, then power consumption is reduced, but the number of signaling procedures increases when transitioning back to connected mode
Solution Approach 1:
The patent introduces an RRC inactive mode where the terminal performs frequency measurements and maintains measurement results in advance while in idle state. When transitioning to connected mode, these pre-acquired measurement results can be directly utilized, eliminating the need for extensive signaling procedures to exchange measurement data, thus resolving the contradiction between power saving and signaling overhead.
2Productivity
If a terminal performs frequency measurements in RRC-inactive mode, then measurement results are available for quick connection resumption, but power consumption increases compared to pure idle mode
Solution Approach 1:
The patent implements periodic frequency measurements in RRC inactive mode where the terminal performs measurements at predetermined intervals rather than continuously. This periodic measurement approach ensures measurement results are available for quick connection resumption while significantly reducing power consumption compared to continuous monitoring, thus resolving the contradiction between connection speed and power consumption.
3Adaptability or versatility
If dual-connectivity is supported in RRC-inactive mode, then network flexibility and service continuity are improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent segments the dual-connectivity functionality by introducing separate master node and secondary node roles. The terminal maintains independent measurement and connection management for each node, allowing network flexibility and service continuity while managing device complexity through clear role separation and independent operation of each connectivity component.
Data Source
AI summary
Disclosed are: a communication technique for merging, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system; and a system therefor. The present disclosure can be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail, security, and safety-related services, and the like) on the basis of 5G communication technology and IoT-related technology. Disclosed are a method and a device for supporting the connection of a terminal operating in an RRC inactivation mode.