Delay-Efficient and Reliable Data Relaying in Ultra Dense Networks using Rateless Codes

TL;DR

This paper proposes a delay-efficient and reliable data relaying strategy using rateless codes in ultra-dense networks, significantly improving end-to-end delay and robustness against channel degradation.

Contribution

It introduces a novel partial decode-and-forward relaying strategy combined with an amicable rateless coding scheme for ultra-dense networks.

Findings

Amicable encoding improves rateless code performance.

PDF relaying outperforms traditional decode-and-forward.

Strategy enhances delay sensitivity and robustness.

Abstract

We investigate the problem of delay-efficient and reliable data delivery in ultra-dense networks (UDNs) that constitute macro base stations (MBSs), small base stations (SBSs), and mobile users. Considering a two-hop data delivery system, we propose a partial decode-and-forward (PDF) relaying strategy together with a simple and intuitive amicable encoding scheme for rateless codes to significantly improve user experience in terms of end-to-end delay. Simulation results verify that our amicable encoding scheme is efficient in improving the intermediate performance of rateless codes. It also verifies that our proposed PDF significantly improves the performance of the decode-and-forward (DF) strategy, and that PDF is much more robust against channel degradation. Overall, the proposed strategy and encoding scheme are efficient towards delay-sensitive data delivery in the UDN scenarios.