Carrier Aggregation Timing Feedback for Throughput Degradation Control
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Solution Overview
Problem
Wireless communications systems face inefficiencies due to time delays between carrier aggregations, leading to resource wastage and throughput degradation in user equipment (UE) when receiving communications over multiple component carriers.
Innovation Solution
User equipment (UE) determines time delays between component carriers and performs throughput degradation procedures, such as reporting time differences, limiting channel quality indicators, or dropping carriers, to mitigate the effects of time delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation is used to increase throughput, then data rate is improved, but time delay between carriers increases causing reception failures
Solution Approach 1:
The patent changes the time synchronization parameter between carriers by introducing a timing adjustment mechanism. The network device configures a time delay parameter that aligns the reception timing of multiple carriers, ensuring that signals from different carriers arrive at the UE within an acceptable time window for successful reception and processing.
2Productivity
If multiple carriers are aggregated for high throughput, then communication capacity is improved, but time synchronization difficulty increases
Solution Approach 1:
The patent implements a feedback mechanism where the UE measures the time delay between carriers and reports this information to the network device. The network device uses this feedback to adjust the timing configuration, creating a closed-loop control system that automatically optimizes carrier synchronization without requiring complex UE-side synchronization processing.
Solution Approach 2:
The network device acts as an intermediary that coordinates the timing between multiple carriers. By centralizing the synchronization control at the network side rather than requiring the UE to independently synchronize multiple carriers, the patent reduces the complexity of time synchronization at the UE while maintaining high communication capacity.
3Reliability
If time delay threshold is set low for reliable reception, then reception reliability is improved, but throughput is reduced due to carrier dropping
Solution Approach 1:
The patent introduces dynamic time delay thresholds that can be adjusted based on channel conditions and service requirements. Instead of using a fixed low threshold that causes carrier dropping, the system dynamically adapts the threshold to maintain reliable reception while maximizing throughput by utilizing all available carriers when conditions permit.
Data Source
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AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify a set of carriers configured for communications between the UE and one or more transmission reception points (e.g., a set of transmission points). The UE may receive multiple communications over different carriers and determine a time difference or delay between two of the carriers (e.g., a first carrier and a second carrier). Based on the time difference and a time difference threshold, the UE may perform a throughput degradation procedure such as transmitting a report indicating the time difference, transmitting a feedback report with channel quality information determined based on the time difference, etc.