Transport Block Sizing for Repeated Satellite Radio Transmissions
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Solution Overview
Problem
Existing transport block size determination methods in cellular communications systems face challenges when repetitions are used, leading to suboptimal modulation orders, inappropriate code rates, and potential selection of inferior LDPC base graphs, which affect performance.
Innovation Solution
The method accounts for the total available resource elements through explicit calculations or signaled scaling factors to determine transport block size, modulation, and code rate, ensuring appropriate code rates and modulation orders for effective transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If transport block size is determined using existing methods for repetitions, then the determination process is simple, but the modulation order becomes suboptimal and code rate becomes inappropriate
Solution Approach 1:
The patent changes the parameters used for transport block size determination by introducing scaling factors that account for the number of repetitions. Instead of using raw resource element counts, the method scales these counts by repetition factors to derive adjusted transport block sizes that yield optimal modulation orders and appropriate code rates for repeated transmissions.
2Reliability
If existing transport block size determination methods are used for repetitions, then the process follows standard procedures, but LDPC base graph selection becomes suboptimal
Solution Approach 1:
The patent modifies the transport block size determination parameters to account for repetitions, which in turn improves LDPC base graph selection. By scaling resource element counts with repetition factors, the method ensures that the resulting transport block sizes map to appropriate LDPC base graphs, enhancing decoding performance for repeated transmissions.
3Adaptability or versatility
If the entire MCS table is to be made useful for repetitions, then optimal performance can be achieved, but the determination methodology becomes more complex
Solution Approach 1:
The patent introduces scaling factors as parameter modifications that enable the entire MCS table to be effectively utilized for repetitions. By adjusting resource element counts with repetition-specific scaling factors, the method expands the usable range of the MCS table, allowing all modulation and code rate combinations to be optimally applied to repeated transmissions.
Data Source
AI summary
Systems and methods for adapting a timer(s) for a satellite-based radio access network are disclosed. Embodiments of a method performed by a user equipment or a base station and corresponding embodiments of a user equipment or a base station are disclosed. In some embodiments, a method performed by a user equipment or a bases station comprises obtaining an amount of resources elements available and determining a transport block size based on the amount of resources elements available. In some embodiments, repetitions are used. In some embodiments, obtaining the available resource elements amount is based on at least one of: one or more explicit calculations and/or one or more signaled scaling factor(s). In some embodiments, the method further comprises determining (or selecting) a modulation and code rate (MCS) based on the amount of resources elements available.