Active BWP Switching Scheduling in 5G Carrier Aggregation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G new radio (NR) wireless communications, the switching delay of active bandwidth parts (BWP) under carrier aggregation can be extended due to overlapping switching times across cells, leading to longer delays and multiple interruptions in other component carriers/cells, especially when DCI-based or timer-based switching occurs.
Innovation Solution
The proposed method involves scheduling the starting time of later active BWP switching in one cell to fall outside the switching delay of an earlier active BWP switching in another cell, with DCI-based switching being scheduled outside the earlier switching delay and timer-based switching being delayed until the earlier switching is completed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple active BWP switching operations are performed across different cells under carrier aggregation, then network flexibility and adaptability are improved, but switching delay is extended and interruptions occur in other cells
Solution Approach 1:
The patent applies preliminary action by checking whether a second BWP switching operation would overlap with the switching delay period of a first BWP switching operation before executing the second switching. The UE determines the time duration of the first switching and refrains from performing the second switching if it would occur during this period, thereby preventing extended delays and interruptions in carrier aggregation operations
Solution Approach 2:
The patent implements dynamics by making the BWP switching operation conditional and adaptive. The UE dynamically adjusts its switching behavior based on the timing relationship between multiple switching operations, deciding whether to proceed with the second switching based on whether it falls within the first switching's time duration. This dynamic approach maintains network flexibility while avoiding harmful overlaps
2Adaptability or versatility
If multiple active BWP switching operations are performed across different cells under carrier aggregation, then network adaptability is improved, but interruptions in other component carriers occur
Solution Approach 1:
The patent applies preliminary action by checking whether a second BWP switching operation would overlap with the switching delay period of a first BWP switching operation before executing the second switching. The UE determines the time duration of the first switching and refrains from performing the second switching if it would occur during this period, thereby preventing extended delays and interruptions in carrier aggregation operations
Solution Approach 2:
The patent applies preliminary anti-action by proactively preventing the second BWP switching operation when it would conflict with the first switching operation's time duration. This preemptive measure avoids the harmful effect of overlapping switching operations that would cause interruptions in other component carriers, maintaining communication reliability
Data Source
AI summary
A method of supporting active bandwidth part (BWP) switching under carrier aggregation (CA) is proposed. To avoid longer switching delay and multiple interruptions in other component carriers (CCs)/cells, the starting time of the later active BWP switching in one cell should fall outside the switching delay of the earlier active BWP switching in another cell. If the later active BWP switching is DCI-based, then the network should schedule the later active BWP switching outside the switching delay of the earlier active BWP switching. If the later active BWP switching is timer-based, then the UE should not perform the later active BWP switching until the earlier active BWP switching is completed.