SCell Activation Order for Known and Unknown Carrier Aggregation Cells
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Solution Overview
Problem
Existing mobile communication systems face inefficiencies in determining the activation order of multiple secondary cells (SCells) during carrier aggregation, leading to unnecessary delays and inefficient use of network resources due to unpredictable UE behavior when activating known and unknown SCells.
Innovation Solution
A method and apparatus for determining an activation order for multiple SCells based on their known or unknown status and frequency band distribution, ensuring that known SCells are activated first, followed by updating the status of unknown SCells, thereby reducing overall activation delay and improving network efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If multiple SCells are activated simultaneously without a determined order, then the activation process appears simple, but the activation delay increases and network resource utilization decreases
Solution Approach 1:
The patent applies preliminary action by determining the activation order of SCells before actually activating them. The network device determines which SCells should be activated first based on their known/unknown status and frequency band relationships, and communicates this order to the UE in advance. This allows the UE to prepare for activation in the correct sequence, reducing overall activation delay while avoiding the complexity of simultaneous activation coordination.
Solution Approach 2:
The patent segments the SCell activation process into distinct phases based on cell status (known vs. unknown) and frequency band groupings. By dividing the activation process into sequential steps where known SCells are activated first, followed by unknown SCells, and by grouping SCells in the same frequency band together, the system reduces activation delay without requiring complex simultaneous coordination across all SCells.
2Productivity
If unknown SCells are activated before known SCells, then the activation process is faster, but the reliability of activation decreases due to potential interference and measurement issues
Solution Approach 1:
The patent applies preliminary action by determining the activation order of SCells before actually activating them. The network device determines which SCells should be activated first based on their known/unknown status and frequency band relationships, and communicates this order to the UE in advance. This allows the UE to prepare for activation in the correct sequence, reducing overall activation delay while avoiding the complexity of simultaneous activation coordination.
Solution Approach 2:
The patent segments the SCell activation process into distinct phases based on cell status (known vs. unknown) and frequency band groupings. By dividing the activation process into sequential steps where known SCells are activated first, followed by unknown SCells, and by grouping SCells in the same frequency band together, the system reduces activation delay without requiring complex simultaneous coordination across all SCells.
3Loss of time
If SCells in different frequency bands are activated in parallel, then the overall activation time is reduced, but the measurement accuracy and scheduling precision deteriorate
Solution Approach 1:
The patent segments the SCell activation process into distinct phases based on cell status (known vs. unknown) and frequency band groupings. By dividing the activation process into sequential steps where known SCells are activated first, followed by unknown SCells, and by grouping SCells in the same frequency band together, the system reduces activation delay without requiring complex simultaneous coordination across all SCells.
Solution Approach 2:
The patent applies preliminary action by determining the activation order of SCells before actually activating them. The network device determines which SCells should be activated first based on their known/unknown status and frequency band relationships, and communicates this order to the UE in advance. This allows the UE to prepare for activation in the correct sequence, reducing overall activation delay while avoiding the complexity of simultaneous activation coordination.
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for determining an activation order in multiple secondary cell (SCell) activation. For example, an order of SCell activation may be determined when a user equipment (UE) receives a command activating multiple SCells. When the to-be-activated SCells include both known SCells and unknown SCells, the UE may activate the known SCell (s) first followed by activating the unknown SCells. If the to-be-activated SCells in a given band are all unknown SCells, the UE may operate such that the rest of the unknown SCell (s) in the same band are assumed to be known. The UE may then activate these SCell (s) in the same manner as known SCell activation and according to the same delay limits. If the to-be-activated SCells are in different bands, the UE may first activate the SCells in the band where there is the largest number of unknown SCells.