Soft Buffer Allocation for Uplink Transport Blocks
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Solution Overview
Problem
Current wireless communication systems face challenges in minimizing uplink data transmission latency due to resource allocation methods that do not efficiently manage radio resources for control and user data, leading to suboptimal utilization and increased latency.
Innovation Solution
The method involves a user equipment (UE) efficiently splitting a soft buffer across multiple partial bands or carriers, allocating resources based on the number of subcarriers, OFDM symbols, HARQ processes, and modulation schemes, allowing for dynamic adjustment of transport block sizes and buffer distribution to optimize resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE uses a fixed soft buffer size for each carrier, then the buffer management is simple, but the resource utilization is inefficient and transmission rate is limited
Solution Approach 1:
The patent implements dynamic soft buffer size adjustment where the buffer size for each carrier is no longer fixed but varies based on the number of subcarriers allocated. The buffer size is calculated as a function of subcarrier count, allowing the system to adapt buffer resources to actual transmission needs, thereby increasing transmission rate while maintaining manageable complexity through standardized calculation rules.
Solution Approach 2:
The patent changes the parameter of soft buffer size from a static fixed value to a dynamic value that depends on the number of subcarriers. This parameter change enables the buffer to scale with resource allocation, improving productivity by ensuring adequate buffer capacity when more subcarriers are allocated, while the relationship remains systematically defined to avoid excessive complexity.
2Productivity
If the UE allocates soft buffer equally across all carriers, then the allocation is simple, but the resource utilization is suboptimal when carriers have different bandwidths
Solution Approach 1:
The patent applies local quality by making the soft buffer allocation specific to each carrier's characteristics, particularly the number of subcarriers. Instead of uniform allocation, each carrier receives a buffer size proportional to its subcarrier count, ensuring that carriers with more bandwidth get more buffer resources. This localized adaptation improves resource utilization while the proportional relationship keeps calculation complexity manageable.
Solution Approach 2:
The patent changes the allocation parameter from equal fixed-size buffers to variable buffers sized according to the number of subcarriers per carrier. This parameter change enables the system to match buffer capacity with actual data transmission capacity of each carrier, improving overall resource utilization without requiring complex optimization algorithms.
3Quantity of substance
If the UE increases the soft buffer size to handle larger transport blocks, then the transmission capacity increases, but the memory resource consumption increases
Solution Approach 1:
The patent implements dynamic buffer size allocation where the soft buffer size for each carrier is determined by the number of subcarriers allocated to that carrier. This dynamic approach ensures that the UE only allocates memory resources proportional to the actual transmission capacity needed, avoiding waste of memory resources while maintaining adequate buffer capacity for handling transport blocks of appropriate sizes.
Data Source
AI summary
A method and device for transmitting a transport block in a wireless communication system is provided. Particularly, a terminal receives, from a base station, information on the number of subcarriers in a partial band included in an allocated carrier. The terminal distributes a soft buffer possessed by the terminal in proportion to the number of subcarriers in the partial band. The terminal determines a transport block size for each partial band according to the size of the distributed soft buffer. The terminal transmits, to the base station, the transport block within the transport block size.