PDSCH Processing Prioritization in Bandwidth Parts
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Solution Overview
Problem
In LTE and LTE-Advanced wireless communication systems, user equipment (UE) faces challenges in processing multiple physical downlink shared channels (PDSCHs) across different bandwidth parts (BWPs) due to varying processing priorities and hybrid automatic repeat request (HARQ) timings, leading to communication disruptions if an agreement on PDSCH processing is not defined.
Innovation Solution
A communication device is designed to receive and process multiple PDSCHs in multiple BWPs by prioritizing them based on their respective HARQ timings, allowing for sequential or parallel processing according to UE capabilities and configured thresholds, ensuring timely handling and transmission of HARQ responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE processes multiple PDSCHs in multiple BWPs simultaneously, then the system throughput is improved, but the UE processing capability is exceeded leading to communication disruptions
Solution Approach 1:
The patent segments the processing of multiple PDSCHs by dividing them into different priority levels (first processing priority and second processing priority). The UE processes PDSCHs with different priorities in a sequential manner rather than simultaneously, ensuring that processing capability limits are not exceeded while still maintaining system throughput through efficient resource utilization across multiple BWPs
Solution Approach 2:
The patent changes the processing parameter by introducing priority-based processing orders and adjusting HARQ timing relationships. By defining that PDSCHs with higher priority are processed before lower priority PDSCHs, and by establishing specific HARQ timing relationships between different priority PDSCHs, the system ensures reliable communication while utilizing multiple BWPs effectively
2Reliability
If the UE prioritizes processing PDSCHs with earlier HARQ timing, then the communication reliability is improved, but the processing time for later HARQ timing PDSCHs is reduced
Solution Approach 1:
The patent applies preliminary action by having the UE receive and buffer PDSCHs with later HARQ timing while prioritizing the processing of PDSCHs with earlier HARQ timing. This allows the system to maintain reliable communication through proper prioritization while preparing data for subsequent processing without losing critical time for high-priority transmissions
Solution Approach 2:
The patent implements feedback mechanisms through HARQ acknowledgments where the UE sends HARQ responses for processed PDSCHs. This feedback loop allows the system to track processing status and adjust timing relationships, ensuring that even when processing time is constrained, the reliability is maintained through proper acknowledgment and retransmission protocols
Data Source
AI summary
A communication device for handling a plurality of physical downlink (DL) shared channels (PDSCHs) in a plurality of bandwidth parts (BWPs) comprises at least one storage device; and at least one processing circuit, coupled to the at least one storage device. The at least one storage device stores instructions, and the at least one processing circuit is configured to execute the instructions of: receiving a first PDSCH in a first BWP in a time period from a network; receiving a second PDSCH in a second BWP in the time period from the network, wherein the first PDSCH is corresponding to a first processing priority and the second PDSCH is corresponding to a second processing priority; and processing the second PDSCH according to the second processing priority.