PDSCH PUSCH Repetition Splitting Across Slot Boundaries
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing PDSCH/PUSCH repetitions across slot boundaries, leading to underutilization of bandwidth, increased latency, and reduced reliability due to the inability to split nominal repetitions effectively.
Innovation Solution
The described techniques enable the indication and determination of signaling information for nominal PDSCH/PUSCH repetitions, allowing for their conversion or generation into actual repetitions that can be split within a slot or across slot boundaries, supporting operation in multi-TRP schemes and ultra-reliable low latency communication modes like eURLLC.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PDSCH/PUSCH repetitions are not split across slot boundaries, then slot structure simplicity is maintained, but bandwidth utilization is underutilized and latency increases
Solution Approach 1:
The patent divides a nominal PDSCH/PUSCH repetition into multiple actual repetitions that can span across slot boundaries. Instead of treating each repetition as a single contiguous block within one slot, the system segments the repetition into parts that can be distributed across multiple slots, thereby improving bandwidth utilization without requiring complete restructure of the slot framework
Solution Approach 2:
The patent introduces dynamic determination of actual repetition boundaries based on slot configuration data. The network device dynamically adjusts how nominal repetitions are mapped to actual transmissions across slots, allowing flexible adaptation to varying slot structures while maintaining systematic control over the repetition process
2Loss of time
If PDSCH/PUSCH repetitions are transmitted without splitting across slots, then transmission scheduling is simplified, but latency increases due to inability to utilize available bandwidth efficiently
Solution Approach 1:
The patent performs preliminary determination of the actual number of repetitions and their mapping to slots before transmission begins. The network device calculates and signals the repetition information in advance, allowing the receiving device to prepare for the actual reception/transmission pattern, thereby reducing latency without requiring complex real-time decisions during transmission
Solution Approach 2:
The patent introduces signaling information as an intermediary between the nominal repetition configuration and the actual transmission pattern. This signaling mechanism translates the high-level nominal repetition parameters into detailed actual repetition instructions, mediating the complexity between scheduling simplicity and transmission efficiency
3Reliability
If nominal PDSCH/PUSCH repetitions are converted to actual repetitions with slot splitting, then reliability improves through better bandwidth utilization, but signaling complexity increases
Solution Approach 1:
The patent changes the parameters of repetition transmission by introducing the concept of actual repetitions with modified timing and slot allocation based on slot configuration data. This parameter transformation allows the system to maintain reliability through better resource utilization while managing signaling overhead through systematic parameter derivation rather than explicit signaling of all details
Data Source
AI summary
PDSCH and PUSCH repetition enhancements are disclosed. A UE may determine configuration data (e.g., transmission parameters, and/or RV data) for PDSCH/PUSCH repetitions which are split across a slot transition within a slot or across a slot boundary based on a quantity of nominal repetitions indicated by a downlink control message (e.g., a downlink control information signal). A quantity of actual repetitions (e.g., splitting of one or more nominal repetitions) may be identified based on the quantity of nominal repetitions and slot configuration parameters. In some aspects, a UE determines a sequence of configuration data for nominal repetitions and generates a second sequence of configuration data for actual repetitions based on the sequence. In other aspects, a UE determines a single sequence of configuration data for actual repetitions based on the quantity of actual repetitions determined from the quantity of nominal repetitions indicated by the downlink control message.