Fixed Transport Block Size Sidelink Transmission
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Solution Overview
Problem
Current wireless communication systems face challenges in achieving low latency and resource conservation, particularly in scenarios requiring deterministic packet sizes and tight latency requirements, such as industrial Internet-of-Things (IIoT) applications.
Innovation Solution
The use of a fixed transport block size (TBS) for sidelink transmissions, which is pre-configured and independent of resource allocation size and modulation and coding scheme (MCS), to avoid packet segmentation and padding, thereby reducing latency and improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic transport block size is used based on resource allocation and MCS, then spectral efficiency is improved, but latency increases due to packet segmentation and padding
Solution Approach 1:
The patent applies segmentation in reverse by fixing the transport block size to prevent unnecessary segmentation. When TBS is fixed, packets of varying sizes can be transmitted without being divided into multiple transport blocks, eliminating segmentation-related latency while maintaining efficient resource utilization through proper TBS selection from a predefined set.
Solution Approach 2:
The patent changes the TBS parameter from being dynamically calculated based on resource allocation and MCS to being selected from a predefined set of fixed values. This parameter change eliminates the variability that causes segmentation and padding, reducing latency while maintaining spectral efficiency through optimized TBS selection.
2Productivity
If dynamic transport block size is used based on resource allocation and MCS, then resource utilization is improved, but reliability decreases due to packet segmentation
Solution Approach 1:
The patent eliminates harmful segmentation by fixing the transport block size. When TBS is fixed, packets are transmitted as complete units without being divided into segments, which improves reliability by avoiding the errors and retransmissions associated with segmented transmissions, while maintaining resource utilization through optimized TBS selection.
Solution Approach 2:
The patent uses a set of predefined fixed TBS values that can be quickly selected and applied without complex calculations. This approach trades the flexibility of dynamic TBS calculation for the reliability of fixed, pre-determined block sizes, eliminating the reliability issues associated with dynamic segmentation while maintaining efficient resource usage.
3Adaptability or versatility
If dynamic transport block size calculation is performed, then adaptability to different transmission conditions is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-defining a set of fixed transport block sizes before transmission occurs. Instead of calculating TBS dynamically based on resource allocation and MCS, the system selects from pre-configured values, significantly reducing computational complexity while maintaining adaptability through the selection of appropriate fixed TBS values for different transmission scenarios.
Solution Approach 2:
The patent changes the TBS parameter from a dynamically calculated value to a selection from predefined fixed values. This parameter change simplifies the device complexity by eliminating complex TBS calculation algorithms while maintaining adaptability through the ability to select from multiple fixed TBS options based on transmission requirements.
Data Source
AI summary
Some aspects described herein relate to transmitting, to a receiving user equipment (UE), an indication of a fixed size transport block size (TBS) used for a sidelink transmission, and transmitting, to the receiving UE and based at least in part on the fixed size TBS, the sidelink transmission over sidelink resources. Other aspects relate to the receiving UE receiving the indication and the sidelink transmission. Additional aspects relate to a base station for configuring the sidelink resources for fixed size TBS.