SCell Activation Signaling for Pathloss and TCI State Setup
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in activating pathloss reference signals and transmission configuration indicator states during secondary cell activation, leading to suboptimal performance and resource utilization.
Innovation Solution
A method and apparatus for wireless communication that allows a user equipment (UE) to measure pathloss and utilize a transmission configuration indicator (TCI) state without additional activation messages, and a base station to transmit activation messages for secondary cells without additional reference signal indications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional messages are transmitted to indicate reference signals and TCI states for activation, then activation accuracy and reliability are improved, but message overhead and system complexity increase
Solution Approach 1:
The patent combines the SCell activation indication with reference signal indication and TCI state indication into a single message. The base station transmits one unified message that simultaneously activates the SCell and provides all necessary configuration information (reference signal for pathloss estimation and TCI state for beam management), eliminating the need for separate activation messages and reducing overall message overhead while maintaining complete information delivery.
Solution Approach 2:
The activation message is designed to serve multiple functions simultaneously: it activates the SCell, indicates the reference signal for pathloss estimation, and indicates the TCI state for beam management. This multi-functional message structure allows a single transmission to accomplish what previously required multiple separate messages, reducing system complexity and message overhead while ensuring all necessary information is provided for reliable activation.
2Loss of information
If multiple separate messages are used for activation, then information completeness is improved, but activation time and processing delay increase
Solution Approach 1:
The patent merges multiple activation-related information elements (SCell activation command, reference signal indication, and TCI state indication) into a single unified message. This consolidation allows the UE to receive all necessary activation information in one transmission, eliminating the sequential processing delays that would occur with multiple separate messages while maintaining complete information delivery for accurate activation.
Solution Approach 2:
The base station prepares and transmits all necessary activation information (reference signal and TCI state) in advance within the same message that activates the SCell. This preliminary inclusion of all required configuration data ensures the UE has everything needed for immediate activation without waiting for additional messages, thereby reducing activation delay while maintaining information completeness.
3Reliability
If redundant activation messages are transmitted, then activation reliability is improved, but resource utilization efficiency decreases
Solution Approach 1:
The patent merges multiple activation functions into a single message structure, eliminating redundant transmissions. By combining SCell activation, reference signal indication, and TCI state indication into one unified message, the system maintains complete and reliable activation information delivery while significantly improving resource utilization efficiency through reduced message overhead and more efficient use of communication resources.
4Manufacturing precision
If separate indication messages are used for reference signals and TCI states, then configuration precision is improved, but device complexity increases
Solution Approach 1:
The activation message is designed as a universal structure that handles multiple configuration functions simultaneously. It includes fields for SCell activation, reference signal indication, and TCI state indication, all within a single standardized message format. This multi-functional approach maintains precise configuration delivery while reducing system complexity by eliminating the need for multiple separate indication mechanisms and their associated processing logic.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, a message that indicates a secondary cell (SCell) for activation. The UE may measure a reference signal on the SCell to estimate pathloss based at least in part on receiving the message and without receiving an additional message that indicates the reference signal for activation. Additionally, or alternatively, the UE may transmit or receive information on the SCell, using a transmission configuration indicator (TCI) state that is based at least in part on receiving the message, without receiving an additional message that indicates the TCI state for activation. Numerous other aspects are described.