The demand for wideband communication in the coastal area (i.e., ≤ 100 km from the coastline) has been rapidly increasing in recent years. Compared to the terrestrial scenario, the coastal environment has long-distance and highly dynamic channels, and the communication devices are more strictly constrained by energy supplies. While the RLNC has the fountain erasure-correction property and is suitable for transmissions over the long-distance dynamic channels, it suffers from high coding coefficient delivery cost and decoding complexity. In this article, we look into the application of sparse network coding in coastal communication systems. We identify two typical multicast scenarios that may appear in coastal communications, namely the relay-aided multicast and multicast from a shore-based base station with D2D communication enabled among the subscribers. We provide a detailed comparison of existing sparse network coding schemes. Based on that, we demonstrate through simulations that an appropriate choice of sparse codes is critical to meet the unique requirements in coastal communication systems. We show that batched sparse code is suitable for relay-aided multicast, and subset-based sparse codes are preferable for D2D-enabled multicast.

中文翻译：

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稀疏网络编码的高效沿海通信


近年来，沿海地区（即距离海岸线≤100公里）的宽带通信需求快速增长。与陆地场景相比，沿海环境具有长距离、高动态的信道，通信设备受到能源供应的约束更为严格。虽然RLNC具有喷泉纠删特性，适合长距离动态信道传输，但其编码系数传递成本高、解码复杂度高。在本文中，我们研究稀疏网络编码在沿海通信系统中的应用。我们确定了沿海通信中可能出现的两种典型多播场景，即中继辅助多播和来自岸基基站的多播，并且用户之间启用了 D2D 通信。我们提供了现有稀疏网络编码方案的详细比较。在此基础上，我们通过模拟证明，适当选择稀疏码对于满足沿海通信系统的独特要求至关重要。我们表明，批量稀疏代码适用于中继辅助多播，而基于子集的稀疏代码更适合支持 D2D 的多播。