Soft Buffer Segmentation for D2D and PDSCH Storage
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Solution Overview
Problem
The existing LTE systems face challenges in effectively processing soft buffer storage for both Physical Downlink Shared Channel (PDSCH) data and Device-to-Device (D2D) data, particularly in managing the large number of bits required for D2D communication, which can occupy the entire system bandwidth and impact link performance.
Innovation Solution
A soft buffer processing method that involves receiving and processing D2D and PDSCH data by User Equipment (UE), with dedicated soft buffer configuration for D2D data and strategic storage of soft bits based on the size of the soft buffer, ensuring that both D2D and PDSCH data are stored efficiently without overwhelming the buffer capacity, prioritizing storage based on data importance when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the soft buffer size is increased to store more D2D data, then the link performance is improved, but the device complexity and memory requirements increase
Solution Approach 1:
The soft buffer is divided into multiple buffer units, each capable of storing soft bits for different transport blocks. This segmentation allows the system to manage large amounts of D2D data efficiently without requiring a single large buffer, thereby improving link performance while controlling device complexity through modular buffer management
Solution Approach 2:
The patent dynamically adjusts the number of buffer units and the allocation of soft buffer resources based on transmission parameters such as the number of transport blocks, code blocks, and D2D communication requirements. By changing buffer parameters adaptively rather than using a fixed buffer size, the system optimizes link performance while avoiding the complexity of managing excessively large static buffers
2Productivity
If the soft buffer stores both D2D data and PDSCH data, then the overall communication efficiency is improved, but the buffer capacity is exceeded
Solution Approach 1:
The soft buffer is segmented into multiple buffer units that can be dynamically allocated between D2D data and PDSCH data. Each buffer unit can store soft bits for different types of data, allowing the system to simultaneously handle both D2D and PDSCH communications without exceeding total buffer capacity, thereby maintaining high communication efficiency
Solution Approach 2:
The patent implements dynamic buffer allocation where the number and size of buffer units are adjusted based on the current transmission requirements of both D2D and PDSCH data. This dynamic adaptation allows the buffer to efficiently accommodate varying data volumes from different sources without being overloaded, optimizing communication efficiency while respecting buffer capacity constraints
3Adaptability or versatility
If the number of buffer units is increased to handle more transport blocks, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The soft buffer is divided into a configurable number of buffer units, each capable of independently storing soft bits for transport blocks. This segmentation provides adaptability to handle different numbers and sizes of transport blocks while keeping each buffer unit's management complexity low, as each unit follows the same structured format and management rules
Solution Approach 2:
Each buffer unit is designed with universal functionality to handle multiple types of data (D2D and PDSCH) and support various transmission scenarios. This multi-functionality reduces the need for specialized buffer structures for different cases, thereby improving adaptability without proportionally increasing device complexity
Data Source
AI summary
Embodiments of the present invention provide a soft buffer processing method, comprising the steps of: first, receiving, by UE, D2D data and PDSCH data; and then performing soft buffer processing on the D2D data, and performing soft buffer processing on the PDSCH data. The present application further discloses a soft buffer processing apparatus. By the present application, the problem of soft buffer processing required for storing soft bits of D2D data and soft bits of PDSCH data can be solved, so that the link performance is improved.