SCell Activation Handling for Dormant and Non-Dormant BWPs
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Solution Overview
Problem
Existing user equipment (UE) protocols do not effectively handle SCell activation commands when the SCell is already in an activated state, particularly regarding the handling of dormant and non-dormant bandwidth parts (BWPs).
Innovation Solution
The UE determines the state and type of the active BWP of the SCell and performs specific actions such as triggering Power Headroom Report (PHR) or not, based on whether the BWP is dormant or non-dormant, and may also activate or deactivate BWPs accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a user manually selects a video quality from a list of available qualities, then the user can choose their preferred quality, but the process becomes tedious and time-consuming
Solution Approach 1:
The system automatically selects video quality based on network conditions and device capabilities without requiring manual user intervention. The server determines appropriate quality levels and sends them to the user equipment, which then automatically adjusts playback quality according to real-time network status, eliminating the need for users to manually select from quality options.
Solution Approach 2:
The system dynamically changes video quality parameters based on network conditions. The server monitors network status and automatically adjusts video bitrate, resolution, and format parameters, sending updated quality instructions to the user equipment. This allows the system to adapt video quality in real-time without user involvement.
2Stability of the object's composition
If the system automatically adjusts video quality based on network conditions, then video playback smoothness is improved, but users lose control over quality selection
Solution Approach 1:
The system implements a feedback mechanism where the server continuously monitors network conditions, buffer status, and playback performance, then automatically adjusts video quality parameters and sends control instructions back to the user equipment. This closed-loop control ensures smooth playback while maintaining adaptability to changing network conditions.
3Loss of energy
If video quality is automatically adjusted, then network bandwidth is optimized, but switching between different quality formats causes buffering
Solution Approach 1:
The system performs preliminary actions by pre-loading multiple video quality versions and preparing them in advance. When network conditions change, the system can switch between pre-prepared quality versions without requiring time-consuming format conversions, thereby reducing buffering time during quality transitions.
Solution Approach 2:
The system uses nested video encoding where multiple quality levels are embedded within a single video stream. This allows the player to switch between different quality levels by selecting different encoded layers rather than converting between separate formats, significantly reducing switching time and buffering requirements.
Data Source
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AI summary
Provided in the present invention are a method performed by user equipment, and user equipment. The method performed by user equipment is a method in which UE, after receiving a command for activating an SCell, triggers a PHR, the method including the following steps: receiving, by UE, an activation command for activating an SCell; when the UE receives the activation command, determining, by the UE, the state of the SCell; and when the UE determines that the SCell is in an activated state before the activation command is received, determining, by the UE, the type of an active BWP of the SCell; and when the UE determines that the type of the active BWP is a non-dormant BWP, triggering, by the UE, a PHR.