Soft Buffer Segmentation for Long-Latency HARQ Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, managing the soft buffer efficiently becomes challenging due to long latency times, which can lead to the need for multiple HARQ process IDs, requiring an effective method to optimize soft buffer usage.
Innovation Solution
A method and device are provided for efficiently managing the soft buffer in communication systems, including methods for calculating transport block size and determining rate matching for coded data, optimizing HARQ processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the soft buffer size is increased to store more HARQ processes, then the reliability of data transmission is improved, but the device complexity and resource consumption increase
Solution Approach 1:
The patent segments the soft buffer into multiple separate buffers, each associated with a specific HARQ process ID. This segmentation allows independent management of each buffer, reducing the complexity of managing a single large buffer while maintaining the ability to store multiple HARQ processes simultaneously, thus improving reliability without proportionally increasing overall complexity.
Solution Approach 2:
The patent establishes preliminary mapping relationships between HARQ process IDs and specific soft buffers before data transmission occurs. This preliminary action enables the terminal to quickly determine which buffer to use or clear without complex real-time decisions, reducing management complexity while ensuring reliable storage for multiple HARQ processes.
2Productivity
If the number of HARQ process IDs is increased to handle long latency, then the productivity of data transmission is improved, but the soft buffer size requirement increases
Solution Approach 1:
By dividing the soft buffer into multiple smaller segments (separate buffers for different HARQ processes), the system can handle more HARQ processes concurrently without requiring a single large buffer. Each segment can be independently managed and cleared, allowing the system to support higher productivity with controlled buffer size requirements.
Solution Approach 2:
The patent implements a mechanism where soft buffers can be selectively cleared when their associated HARQ processes are no longer needed. This allows the system to recycle buffer resources, enabling support for multiple HARQ processes (improving productivity) without permanently allocating large buffer sizes, as buffers are recovered and reused.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Disclosed are: a communication technique for merging, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system; and a system therefor. The present disclosure can be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail, security- and safety-related services, and the like) on the basis of 5G communication technology and IoT-related technology. The invention of the disclosure presents a method for effectively managing a HARQ process for satellite communication or V2X communication.