UE Processing Time for PDSCH Repetition in Same Slot
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing physical downlink shared channel (PDSCH) repetition within the same slot, which affects interference mitigation and overall network performance.
Innovation Solution
The proposed solution enables PDSCH repetition in the same slot by determining an overall processing time at a user equipment (UE) based on multiple transmission occasions indicated by downlink control information (DCI), allowing for efficient decoding and HARQ-ACK scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDSCH repetition is implemented within the same slot, then reliability is improved through multiple transmission occasions, but processing time becomes insufficient for UE to decode and prepare HARQ-ACK
Solution Approach 1:
The processing time determination is segmented by transmission occasion. The UE determines processing time separately for each PDSCH transmission occasion based on its start and end symbols, then selects the maximum processing time among all occasions. This allows the system to accommodate multiple transmission occasions within the same slot while ensuring sufficient processing time is allocated.
Solution Approach 2:
The patent introduces a new dimension for processing time calculation by considering the time resources (start symbol and length) of each transmission occasion as additional parameters. This multi-dimensional approach enables the UE to calculate processing time based on the specific temporal characteristics of each PDSCH occasion, rather than using a fixed or single-value processing time.
2Productivity
If multiple transmission occasions are scheduled in the same slot, then network performance is improved through interference mitigation, but device complexity increases for managing multiple PDSCH receptions
Solution Approach 1:
The network performs preliminary action by determining the processing time requirements before scheduling multiple PDSCH transmission occasions. By calculating the maximum processing time needed across all occasions and communicating this to the UE, the network prepares the necessary timing information in advance, reducing the complexity of real-time processing at the UE.
Solution Approach 2:
The patent changes the parameter representation from a single processing time value to a set of parameters including start symbol, length, and processing time for each transmission occasion. This parameter transformation enables the UE to systematically manage multiple PDSCH receptions by comparing and selecting the maximum processing time, thereby reducing overall device complexity.
Data Source
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AI summary
In some implementations, a method of wireless communication includes receiving, at a user equipment (UE) from a base station, a downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH). The PDSCH includes a first transmission occasion and a second transmission occasion following the first transmission occasion during a single slot. The method further includes determining, at the UE, an overall processing time following a last symbol of the PDSCH.