Dormant Mode for SCG Suspension in 5G Dual Connectivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Next-generation mobile communication systems face challenges in managing processing latency and battery consumption when using carrier aggregation or dual connectivity, particularly in maintaining multiple cells in activated or deactivated states, and require efficient data processing procedures for high data rates.
Innovation Solution
Implementing a dormant mode or suspension mode for User Equipment (UE) to rapidly activate and deactivate carrier aggregation or dual connectivity, operating in units of bandwidths, cells, or cell groups, and optimizing ciphering, integrity protection, and Automatic Repeat Request (ARQ) operations to support high data rates and reduce battery consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple cells are maintained in activated state for carrier aggregation or dual connectivity, then data transmission rate is improved, but battery consumption increases
Solution Approach 1:
The patent implements a dormant mode that dynamically transitions cell groups between active and dormant states based on data transmission requirements. When data transmission is not required, the secondary cell group is suspended and the terminal stops monitoring PDCCH, reducing power consumption. When data transmission is needed, the system rapidly resumes the secondary cell group, maintaining high data rates when necessary.
2Use of energy by moving object
If multiple cells are maintained in deactivated state to reduce battery consumption, then battery consumption is reduced, but processing latency increases when activating
Solution Approach 1:
The patent introduces a dormant mode as an intermediate state between active and deactivated states. In this mode, the terminal stops monitoring PDCCH to save power but maintains cell group configuration information and performs channel measurements, enabling rapid activation when needed. This preliminary preparation reduces the activation latency compared to fully deactivated state while consuming less power than fully activated state.
3Speed
If channel measurement is performed frequently to ensure rapid activation, then activation speed is improved, but battery consumption increases
Solution Approach 1:
The patent implements periodic channel measurement in dormant mode rather than continuous measurement. The terminal performs channel measurements at configured intervals while in dormant state, maintaining enough channel knowledge to enable rapid activation when needed, while avoiding continuous measurement that would consume excessive power.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method performed by a terminal in a wireless communication system is provided. The method comprises receiving, from a first base station associated with a master cell group (MCG), a first radio resource control (RRC) message including a second RRC message generated by a second base station associated with a secondary cell group (SCG), identifying first information indicating a deactivation of the SCG included in the second RRC message, and determining to deactivate the SCG based on the first information indicating the deactivation of the SCG.