Practical Sliding Window Recoder: Design, Analysis, and Usecases

TL;DR

This paper introduces a practical implementation of a sliding window network coding recoder, enabling efficient, on-the-fly packet recoding in multi-hop networks, and analyzes its performance to approach network capacity.

Contribution

It presents the first detailed design and analysis of an on-the-fly sliding window network coding recoder, enhancing network efficiency and capacity utilization.

Findings

Recoder enables near-capacity network performance.

Improves efficiency of intermediate node transmissions.

Facilitates adaptive coding in multi-hop networks.

Abstract

Network coding has been widely used as a technology to ensure efficient and reliable communication. The ability to recode packets at the intermediate nodes is a major benefit of network coding implementations. This allows the intermediate nodes to choose a different code rate and fine-tune the outgoing transmission to the channel conditions, decoupling the requirement for the source node to compensate for cumulative losses over a multi-hop network. Block network coding solutions already have practical recoders but an on-the-fly recoder for sliding window network coding has not been studied in detail. In this paper, we present the implementation details of a practical recoder for sliding window network coding for the first time along with a comprehensive performance analysis of a multi-hop network using the recoder. The sliding window recoder ensures that the network performs closest to its capacity and that each node can use its outgoing links efficiently.