Secondary Cell Dormancy Indication in DCI for Power Saving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication systems do not support dormancy indication through Downlink Control Information (DCI), leading to poor power-saving effects in communication devices.
Innovation Solution
Implementing a method for secondary cell dormancy indication using DCI, where an information field in the DCI carries dormancy indications on a per-secondary cell or per-secondary cell group basis, including a scheduling-related field, and optionally using additional bits for increased indication capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If dormancy indication is not supported through DCI in existing communication systems, then the system maintains simple DCI structure, but the power-saving effect of communication devices is poor
Solution Approach 1:
The patent applies multi-functionality by enabling DCI to serve dual purposes: traditional data scheduling and dormancy indication. The DCI format is enhanced to include dormancy indication fields that can indicate dormancy states of secondary cells, allowing a single control message to perform multiple functions and thereby improve power saving without adding separate signaling mechanisms
Solution Approach 2:
The patent changes the parameters of DCI by introducing new information fields specifically designed for dormancy indication. These fields include dormancy indication bits that can indicate dormancy state, secondary cell group index, and other relevant parameters, transforming DCI from a simple scheduling tool into a comprehensive control mechanism that manages both data transmission and power state transitions
2Loss of energy
If DCI is enhanced to carry dormancy indication information, then the power-saving effect is improved, but the DCI information field complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the dormancy indication information into distinct fields within the DCI structure. Separate information fields are created for different purposes: dormancy indication bits for state signaling, secondary cell group index for identifying specific cells, and other auxiliary fields. This segmented approach organizes the complexity into manageable, functionally-separated components
Solution Approach 2:
The patent introduces dynamic field configurations where certain DCI fields are present or activated based on specific conditions. The dormancy indication fields are dynamically included in DCI messages when dormancy management is required, and can be configured differently based on network conditions, cell configurations, and power saving requirements, making the DCI structure adaptable rather than statically complex
3Measurement precision
If dormancy indication is provided on a per-secondary cell basis, then the indication precision is improved, but the signaling overhead increases
Solution Approach 1:
The patent introduces a new dimension by organizing secondary cells into groups (secondary cell groups) and providing dormancy indication at the group level rather than strictly at the individual cell level. This dimensional shift from cell-by-cell indication to group-based indication reduces the number of indication bits required while maintaining effective dormancy management across multiple cells through the group index mechanism
Data Source
AI summary
The embodiments of the present disclosure provide a method for a secondary cell dormancy indication and a communication device, the method including: transmitting first DCI, an information field in the first DCI being used for carrying a dormancy indication, the dormancy indication being used for providing a secondary cell dormancy indication on a per-secondary cell basis or on a per-secondary cell group basis, and the information field including a scheduling-related field.