Transport Block Size Determination for Variable Symbol Resource Blocks
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Solution Overview
Problem
The existing LTE standard is unable to determine the transport block size (TBS) effectively when the number of symbols in a resource block (PRB) is changeable, leading to inefficiencies in time-frequency resource utilization and error-correction performance.
Innovation Solution
A method and apparatus for determining the TBS based on the modulation and coding scheme, resource characteristics of the allocated resource block, and the variable number of symbols, allowing for adaptive adjustment and consideration of spatial multiplexing impacts, thereby generating a transport block that avoids resource wastage and improves error-correction performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the quantity of symbols in a PRB is fixed according to existing LTE standard, then the TBS determination method is simple and standardized, but it cannot adapt to new service scenarios requiring variable symbol quantities
Solution Approach 1:
The patent makes the TBS determination method dynamic by introducing variable symbol quantities per PRB. Instead of using a fixed symbol count, the system now calculates TBS based on the actual number of symbols allocated in each PRB, which can vary depending on service requirements. This dynamic approach allows the system to adapt to different service scenarios while maintaining a systematic method for TBS calculation.
Solution Approach 2:
The patent changes the parameter of symbol quantity from a fixed value to a variable parameter. By allowing the symbol quantity per PRB to change based on service type and resource allocation, the TBS determination can adapt to different scenarios. The method incorporates this variable parameter into the TBS calculation process, enabling flexible resource utilization.
2Reliability
If the TBS is determined using existing LTE standard methods, then the determination process is straightforward, but it leads to time-frequency resource wastage and poor error-correction performance when symbol quantities vary
Solution Approach 1:
The patent implements a feedback mechanism where the actual symbol quantity in each PRB is measured and used to adjust the TBS determination. The system calculates the number of available resource elements based on the actual symbol count, then uses this information to determine the appropriate TBS. This feedback loop ensures that the TBS matches the actual available resources, improving both error-correction performance and resource utilization.
Solution Approach 2:
The patent performs preliminary calculation of the symbol quantity and resource element count before determining the TBS. By calculating the actual number of available resource elements in advance based on the variable symbol quantity, the system can then select an appropriate TBS that fully utilizes the available resources without wastage or performance degradation.
3Adaptability or versatility
If the quantity of symbols in each PRB is made variable to meet new service requirements, then resource utilization and service adaptability improve, but the existing TBS determination method becomes inapplicable
Solution Approach 1:
The patent segments the TBS determination process into distinct steps: first calculating the number of resource elements based on variable symbol quantities, then using this calculated value to determine the TBS. This segmentation makes the complex determination process more manageable and systematic, breaking it down into calculable components that can be implemented algorithmically.
Solution Approach 2:
The patent introduces an intermediary calculation step that computes the number of resource elements based on the variable symbol quantity. This intermediary value serves as a bridge between the variable symbol count and the final TBS determination, making the relationship between these parameters explicit and systematic while maintaining ease of implementation.
Data Source
AI summary
This application relates to the field of communications technologies, and discloses a transport block generation method and apparatus. The method includes: determining a TBS based on an MCS of a receiving device, a resource characteristic of an RB allocated to the receiving device, and a quantity of symbols, where the quantity of symbols is a quantity of symbols included in each RB, and each RB includes a same quantity of symbols; and generating a TB based on a TBS. TBS is determined based on the MCS of the receiving device, a quantity of RBs allocated to the receiving device, and the quantity of symbols included in the RB, and the TB is generated based on the determined TBS. The quantity of symbols included in the RB is considered in determining the TBS. Therefore, the determined TBS may vary with the quantity of symbols included in the RB.