# S-PRAC: Fast Partial Packet Recovery with Network Coding in Very Noisy Wireless Channels

## TL;DR

S-PRAC is a novel, fast partial packet recovery scheme using network coding, optimized for very noisy wireless channels, outperforming previous solutions like DAPRAC especially under high error conditions.

## Contribution

It introduces S-PRAC, a new partial packet recovery method that improves speed and efficiency over existing solutions in noisy wireless environments.

## Key findings

- S-PRAC detects and corrects errors quickly in noisy channels.
- S-PRAC significantly outperforms DAPRAC with many errors.
- The scheme effectively reduces transmission overhead.

## Abstract

Well-known error detection and correction solutions in wireless communications are slow or incur high transmission overhead. Recently, notable solutions like PRAC and DAPRAC, implementing partial packet recovery with network coding, could address these problems. However, they perform slowly when there are many errors. We propose S-PRAC, a fast scheme for partial packet recovery, particularly designed for very noisy wireless channels. S-PRAC improves on DAPRAC. It divides each packet into segments consisting of a fixed number of small RLNC encoded symbols and then attaches a CRC code to each segment and one to each coded packet. Extensive simulations show that S-PRAC can detect and correct errors quickly. It also outperforms DAPRAC significantly when the number of errors is high.