Transport Block Size Determination for Multi-Slot PUSCH Transmission
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Solution Overview
Problem
Existing wireless communication systems lack clear methods for signaling the number of slots to which a transport block is mapped and determining the size of the transport block in multi-slot PUSCH transmission, leading to operational challenges and inefficiencies.
Innovation Solution
A method for determining the transport block size based on the number of resource elements allocated for the first PUSCH, which involves multiplying the number of slots by the smaller of a predetermined fixed value and the number of resource elements allocated within a physical resource block, and the number of allocated physical resource blocks, with the processor performing this calculation and transmitting the transport block across multiple slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transport block is mapped to multiple slots for transmission, then the transmission capacity and reliability are improved, but the complexity of signaling and determining transport block size increases
Solution Approach 1:
The patent changes the parameter of transport block mapping from single-slot to multi-slot mapping. By mapping a transport block to multiple slots (indicated by parameter Z ≥ 2), the system improves transmission reliability through repeated transmission across multiple time resources, while managing the complexity through standardized procedures for determining transport block size based on total resource elements across all slots
Solution Approach 2:
The patent segments the transmission process by dividing the transport block transmission across multiple slots rather than confining it to a single slot. Each slot carries a portion or repetition of the transport block, allowing the receiver to combine information from multiple slots to improve reliability. The total resource elements are calculated by multiplying per-slot resources by the number of slots Z
2Productivity
If the transport block size is determined based on total resource elements across multiple slots, then the transmission efficiency is improved, but the difficulty of calculating and signaling the size increases
Solution Approach 1:
The patent applies preliminary action by pre-defining the methodology for determining transport block size before transmission occurs. The standard specifies that the total number of resource elements is calculated by multiplying the number of resource elements per slot by the number of slots Z. This predetermined calculation approach simplifies the process during actual transmission, as both transmitter and receiver follow the same pre-agreed methodology
Solution Approach 2:
The patent incorporates feedback mechanisms where the transmitter determines the transport block size based on calculated total resource elements, and the receiver uses the same calculation methodology to verify and decode the transport block. The standardized approach ensures both ends have consistent understanding of the transport block size without requiring additional explicit signaling
3Reliability
If repeated transmission is applied to multi-slot PUSCH, then the reliability is improved, but the overhead of media access control header and signaling increases
Solution Approach 1:
The patent merges the transport block transmission across multiple slots by treating them as a unified multi-slot transmission entity. The media access control header and signaling information are efficiently utilized across all slots carrying the repeated transport block, rather than duplicating overhead in each slot independently. This combining approach reduces total overhead while maintaining the reliability benefits of repeated transmission
Data Source
AI summary
Provided are a method and apparatus for determining a transport block size (TBS) when transmitting a transport block through a PUSCH by applying transport block processing over multiple slots (TBoMS) in a wireless communication system. The UE determines the TBS based on the number of resource elements (NRE) allocated for the PUSCH, in this case, considers the number of slots for the TBoMS.