SCG State Control for PSCell Dormancy and Power Saving
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Solution Overview
Problem
In existing communication technologies, the Primary SCG Cell (PSCell) remains activated even after data transmission on the SCG side has ended, leading to power wastage. Conversely, releasing the SCG after data interruption causes significant data transmission delays and increased signaling consumption when reconfiguring the SCG for resumed data transmission.
Innovation Solution
A method and apparatus for SCG state control in a UE, MN, SN, and medium, where the UE determines whether there is data transmission on the SCG and controls the PSCell to enter a dormant state when no data transmission is detected. This method reduces power consumption and minimizes data transmission delays by allowing the SCG to be quickly reactivated when data transmission resumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the PSCell remains activated after data transmission ends, then data transmission can be quickly resumed, but power consumption increases
Solution Approach 1:
The patent applies dynamics by introducing a dormant state that allows the PSCell to transition between activated and dormant states based on data transmission needs. The PSCell transitions to dormant state when no data transmission occurs for a predetermined time, and transitions back to activated state when data transmission is detected, optimizing both power consumption and transmission speed dynamically.
Solution Approach 2:
The patent changes the operational parameter of the PSCell from a binary activated/deactivated state to a three-state system (activated, dormant, deactivated). This parameter change allows the system to fine-tune power consumption while maintaining quick resume capability through the dormant state, which consumes less power than activated but more than deactivated.
2Use of energy by moving object
If the SCG is released after data interruption, then power consumption is saved, but data transmission delay increases and signaling consumption increases
Solution Approach 1:
The patent avoids complete SCG release by introducing an intermediate dormant state. The PSCell transitions to dormant state rather than being completely released, allowing the SCG configuration to be preserved. When data transmission resumes, the system only needs to transition from dormant to activated state, avoiding the time-consuming reconfiguration process of complete SCG setup.
Solution Approach 2:
The patent performs preliminary action by maintaining SCG configuration information in the dormant state. The network side device and UE both retain the SCG configuration details even when the PSCell is dormant, so that when data transmission resumes, the configuration is already in place and no reconfiguration is needed, only state transition occurs.
3Use of energy by moving object
If the SCG is released after data interruption, then power consumption is reduced, but signaling consumption increases
Solution Approach 1:
The patent applies discarding and recovering by selectively discarding the detailed SCG configuration information when transitioning to dormant state, while retaining only the essential state indication. When resuming data transmission, the system recovers the SCG configuration from the preserved state information, avoiding the need to re-transmit and re-configure all SCG parameters, thus reducing signaling consumption.
Data Source
AI summary
Disclosed are an SCG state control method and apparatus, a UE, an MN, an SN, and a medium. The method comprises: a UE determining whether there is data transmission at an SCG; when it is determined that there is no data transmission at the SCG, controlling a PSCell in the SCG to enter a sleep state; and when it is determined that there is data transmission at the SCG, controlling the PSCell in the SCG to enter an activated state. In the embodiments of the present application, when it is determined that there is no data transmission at an SCG, a UE controls a PSCell in the SCG to enter a sleep state, thereby avoiding wasteful power consumption; moreover, there is no need to release the SCG, such that there is also no need to configure the SCG again when data transmission is initiated at an SCG side again, and data transmission is scheduled at the SCG in a timely manner according to a CSI measurement result reported when the PSCell is in the sleep state, thereby reducing the data transmission delay. Provided is a solution for fast recovery of data transmission under energy saving conditions.