Transport Block Transmission Order Balancing 5G Subframes
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Solution Overview
Problem
In wireless communication systems, particularly in 5G NR for eMTC and NB-IoT, the transmission of multiple transport blocks (TBs) is inefficient due to invalid subframes, leading to unequal repetition times and extended transmission duration, which affects time diversity and decoding performance.
Innovation Solution
The method involves determining a redundancy version (RV) index and a scrambling sequence for multiple TBs, ensuring these are applied consistently across specific consecutive subframes, and adjusting the transmission order to balance the transmission duration and provide equivalent opportunities for all TBs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transport blocks are transmitted using conventional scheduling methods, then the transmission can be performed, but the transmission duration is extended and time diversity is reduced due to invalid subframes
Solution Approach 1:
The patent segments the transmission of multiple transport blocks by introducing a transmission order that processes TBs in a specific sequence based on their completion status. This segmentation allows the system to manage invalid subframes more effectively by dividing the transmission process into manageable parts, ensuring that TBs with fewer valid subframes are prioritized, thereby reducing overall transmission duration while maintaining decoding performance.
Solution Approach 2:
The patent implements dynamic adjustment of transmission order based on the number of valid subframes available for each transport block. The system dynamically determines which TB should be transmitted next by comparing the counts of valid subframes, allowing the transmission process to adapt to varying conditions. This dynamic approach optimizes the use of available time resources and reduces total transmission duration without compromising reliability.
2Productivity
If transport blocks are transmitted without adjusted transmission order, then transmission can proceed, but unequal repetition times occur leading to different transmission delays
Solution Approach 1:
The patent applies local quality by treating each transport block differently based on its specific characteristics, particularly the number of valid subframes it has available. The transmission order is locally optimized for each TB, with those having fewer valid subframes receiving priority. This localized differentiation ensures that each TB gets appropriate transmission resources, eliminating unequal repetition times and reducing overall transmission delay while maintaining high productivity.
Solution Approach 2:
The system incorporates feedback mechanisms to monitor the transmission status of each transport block and adjust the transmission order accordingly. By continuously tracking which TBs have fewer valid subframes remaining, the system can dynamically reorder transmissions to ensure equitable treatment. This feedback-driven approach balances transmission efficiency with fair time allocation, preventing any single TB from experiencing excessive delay.
3Adaptability or versatility
If invalid subframes are present in the transmission schedule, then scheduling flexibility is maintained, but equivalent transmission opportunities for multiple TBs are lost
Solution Approach 1:
The patent introduces asymmetry in the transmission schedule by explicitly accounting for the different impacts of invalid subframes on various transport blocks. Instead of treating all TBs uniformly, the system creates an asymmetric transmission order that compensates for the unequal availability of valid subframes. This asymmetric approach maintains scheduling flexibility regarding invalid subframes while ensuring that all TBs receive equivalent transmission opportunities, as those with fewer valid subframes are given priority in the asymmetric ordering.
Data Source
AI summary
Method and apparatus for data transmission are disclosed. One method includes determining a redundancy version (RV) index for a first number of transport blocks (TBs), the RV index applied to at least one of the first number of TBs lasts for a third number of a first type of consecutive subframes; determining a scrambling sequence, the scrambling sequence applied to at least one of the first number of TBs lasts for a fourth number of a second type of consecutive subframe; and sending or receiving the first number of TBs according to the RV index, the scrambling sequence and a transmission order.