HARQ Soft Buffer Partitioning via Carrier Weighting
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Solution Overview
Problem
Conventional HARQ schemes face inefficiencies in managing downlink soft buffers, particularly with carrier aggregation, as they equally divide soft buffer bits among carriers regardless of channel conditions and interference levels, leading to suboptimal buffer utilization and performance.
Innovation Solution
The proposed solution involves using carrier-dependent weighting factors to partition the soft buffer among aggregated carriers based on their specific bandwidths and characteristics, allowing for dynamic allocation of soft buffer bits to account for differing channel conditions and interference levels, and implementing buffer repartitioning rules to minimize the impact of carrier-related reconfigurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional HARQ schemes equally divide soft buffer bits among carriers, then buffer allocation is simple, but buffer utilization efficiency deteriorates under carrier aggregation with different channel conditions
Solution Approach 1:
The patent applies local quality by assigning different soft buffer sizes to different carriers based on their specific characteristics (bandwidth, channel conditions, interference levels). Instead of uniform allocation, each carrier receives a customized buffer portion proportional to its actual data transmission requirements, thereby optimizing buffer utilization efficiency while maintaining manageable allocation complexity through carrier-dependent weighting factors.
2Device complexity
If soft buffer is partitioned equally among aggregated carriers, then partitioning is straightforward, but HARQ performance deteriorates due to suboptimal buffer allocation
Solution Approach 1:
The patent employs parameter changes by introducing carrier-dependent weighting factors that dynamically adjust soft buffer allocation based on varying carrier characteristics such as bandwidth, channel conditions, and interference levels. This allows the system to adapt buffer partitioning to current operational parameters, improving HARQ performance while managing complexity through standardized weighting calculations.
3Adaptability or versatility
If carrier-related reconfiguration occurs, then network flexibility is improved, but buffer repartitioning impact increases HARQ operation disruption
Solution Approach 1:
The patent applies preliminary action by establishing buffer repartitioning rules in advance that define how soft buffer allocation should be adjusted during carrier reconfiguration. These pre-defined rules enable the system to automatically and efficiently reallocate buffer resources when carrier configurations change, minimizing disruption to ongoing HARQ operations while maintaining network flexibility.
Data Source
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AI summary
A method, system and device are provided for partitioning a HARQ soft bit buffer between aggregated carriers as a function of carrier-related weighting factors so that the total number of soft buffer bits are efficiently allocated to obtain a plurality of soft buffer partitions for the plurality of aggregated carriers which are sized based on relative carrier- related weighting factors.