SCG Suspension for Serving Cell Activation Latency
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Solution Overview
Problem
Current wireless communication technologies face challenges in efficiently managing the dormancy and activation states of serving cells in wireless communication systems, particularly in scenarios where power conservation and rapid data transmission are crucial, such as in 5G New Radio (NR) networks, leading to suboptimal energy usage and latency.
Innovation Solution
Implementing SCG suspension techniques that allow terminals to detect data transmission needs and initiate or receive messages to activate or deactivate serving cells, transitioning them between dormancy and non-dormancy states, using RRC, MAC, and PRACH messages to manage cell groups and configure channel measurement reporting, thereby optimizing power usage and data transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If serving cells are kept in deactivated state to conserve power, then energy consumption is reduced, but data transmission latency increases when data needs to be sent
Solution Approach 1:
The patent applies preliminary action by pre-configuring cell groups and maintaining their configuration in the terminal even when deactivated. This allows the cells to be quickly activated when needed without full reconfiguration delays, thus reducing activation latency while keeping cells deactivated for power savings during idle periods.
Solution Approach 2:
The patent implements dynamic state management by allowing cell groups to transition between deactivated and activated states based on data transmission needs. The network can dynamically control this transition through RRC messages, enabling the system to adapt between power-saving mode and high-performance mode as conditions change.
2Speed
If serving cells are activated for rapid data transmission, then transmission speed is improved, but energy consumption increases
Solution Approach 1:
The patent segments the cell group into multiple cells that can be independently managed. The network can activate only the specific cells needed for data transmission rather than activating the entire cell group, thus reducing power consumption while maintaining transmission speed for the required data flow.
Solution Approach 2:
The patent applies partial action by activating only the necessary portion of cell resources (specific cells within a cell group) rather than the entire group. This allows the system to achieve sufficient transmission capacity for the data being sent without the full power consumption of activating all cells.
3Loss of energy
If cell groups are frequently activated and deactivated, then power efficiency is improved, but system complexity increases due to state management overhead
Solution Approach 1:
The patent merges the state management of multiple cells into a unified cell group structure. By managing cells in groups rather than individually, the system reduces the complexity of tracking and controlling each cell's state separately, while still enabling efficient activation and deactivation of the entire group or subsets of cells.
Data Source
AI summary
Methods, systems, and devices related to digital wireless communication, and more specifically, to techniques related to implementing SCG suspension. In one exemplary aspect, a method for wireless communication includes detecting data to be transmitted via a group of cells. The method also includes transmitting a first message initiating activation of the group of cells to a network node. In another exemplary aspect, a method for wireless communication includes receiving a first message providing an indication to activate a serving cell included in a group of cells from a network node. The method also includes activating the serving cell of the group of cells based on the first message.