Multi-SCell Activation Priority for PCell-First PUCCH Readiness
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Solution Overview
Problem
Existing communication technologies face challenges in determining an appropriate activation order for multiple secondary cells (SCells), leading to unnecessary delay extensions, especially when a physical uplink control channel (PUCCH) SCell is involved, which affects transmission efficiency.
Innovation Solution
A scheme where a device prioritizes the activation of secondary cells associated with a primary cell over those associated with a PUCCH SCell, based on timing advance groups, CSI reporting resources, and other configurations, to minimize activation delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cell detection is performed for all SCells simultaneously during activation, then all SCells can be activated, but activation delays increase due to equal competition among SCells
Solution Approach 1:
The patent segments the SCells into two distinct groups: SCells associated with PCell and SCells associated with PUCCH SCell. This segmentation allows different activation priorities to be assigned to different groups, resolving the contradiction by enabling simultaneous activation of all SCells while reducing overall activation delay through differentiated handling of cell detection processes.
Solution Approach 2:
The patent applies preliminary action by prioritizing the activation of SCells associated with PCell before SCells associated with PUCCH SCell. By performing cell detection and activation for PCell-associated SCells first, the system reduces the overall activation delay while ensuring all SCells are eventually activated, thus resolving the time-loss issue without compromising activation completeness.
2Productivity
If SCells associated with PUCCH SCell are activated first, then PUCCH transmission can be established, but activation of PCell-associated SCells is delayed
Solution Approach 1:
The patent inverts the conventional approach by prioritizing PCell-associated SCells over PUCCH SCell for activation. This inversion resolves the contradiction by recognizing that PCell-associated SCells form the foundation for stable uplink transmission, and delaying their activation would ultimately hinder PUCCH transmission readiness. The system achieves both goals by establishing the foundation first.
Solution Approach 2:
The patent applies preliminary action by ensuring PCell-associated SCells are activated and stabilized before activating PUCCH SCell. This preliminary establishment of reliable uplink transmission paths associated with PCell provides a solid foundation for subsequent PUCCH transmission, resolving the contradiction between transmission readiness and activation delay.
3Ease of operation
If multiple SCells are activated in parallel without prioritization, then activation process is simplified, but activation delays extend due to resource competition
Solution Approach 1:
The patent maintains ease of operation by keeping the overall activation process straightforward while introducing segmentation internally. The system divides SCells into priority groups based on their association (PCell vs. PUCCH SCell), allowing simple prioritized processing without complex resource management, thus resolving the contradiction between simplicity and activation delay.
Solution Approach 2:
The patent applies parameter changes by modifying the activation priority parameter for different SCell groups. By changing the priority parameter based on SCell association type, the system achieves differentiated activation handling that reduces delays while maintaining the simplicity of the overall activation mechanism, resolving the contradiction between operational simplicity and activation efficiency.
Data Source
AI summary
Example embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media for activation of multiple SCells. In example embodiments, a terminal device receives, from a network device, an instruction to activate a plurality of secondary cells including a physical uplink control channel, PUCCH, secondary cell. The PUCCH secondary cell is configured with a PUCCH. Then, the terminal device determines, from within the plurality of secondary cells, one or more secondary cells associated with a primary cell and one or more secondary cells associated with the PUCCH secondary cell. Moreover, the terminal device prioritizes activation of the one or more secondary cells associated with the primary cell over activation of the one or more secondary cells associated with the PUCCH secondary cell.