Secondary Cell Activation Using Reference Bandwidth Parts
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Solution Overview
Problem
Wireless devices face challenges in efficiently activating secondary cells due to the lack of configured transmission configuration indicator states for downlink bandwidth parts, which hinders rapid communication and resource management in wireless communication networks.
Innovation Solution
The implementation of a secondary cell activation reference signal that indicates a transmission configuration indicator state, configured in a reference bandwidth part, facilitates expedited secondary cell activation by using a parameter like the downlink-or-joint transmission configuration indicator state list, ensuring proper reception and measurement of reference signals even without configured downlink bandwidth parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If transmission configuration indicator states are not configured for downlink bandwidth parts of secondary cells, then device complexity is reduced, but secondary cell activation speed deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-configuring transmission configuration indicator states in a reference bandwidth part before secondary cell activation. This allows the wireless device to have TCI states ready in advance, enabling rapid activation of secondary cells without requiring complex downlink bandwidth part configurations, thus resolving the contradiction between reduced configuration complexity and maintained activation speed
Solution Approach 2:
The patent uses a reference bandwidth part as an intermediary to carry transmission configuration indicator states. This reference BWP acts as a mediator that provides necessary TCI state information without requiring full downlink bandwidth part configuration, thereby reducing device complexity while enabling fast secondary cell activation through the intermediary reference structure
2Ease of operation
If downlink bandwidth parts are not configured for secondary cells, then ease of operation is improved, but communication efficiency deteriorates
Solution Approach 1:
The patent applies universality by making the reference bandwidth part serve multiple functions: it provides transmission configuration indicator states for secondary cell activation, enables efficient communication, and maintains configuration simplicity. The reference BWP becomes a multi-functional element that delivers TCI states without requiring separate downlink bandwidth part configurations, thus achieving both ease of operation and communication efficiency
Data Source
AI summary
A wireless device may be configured for secondary cell activation. Transmission configuration indicator states of the wireless device may be configured in a reference bandwidth part of a reference cell, for example, if transmission configuration indicator states may not be configured for a downlink bandwidth part of a secondary cell. A parameter may be used to indicate which transmission configuration indicator state is to be used for receiving and/or measuring reference signals, which may expedite secondary cell activation for the wireless device.