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Hybrid error correction in fragmented IoT media streams
Transactions on Emerging Telecommunications Technologies ( IF 3.6 ) Pub Date : 2022-07-15 , DOI: 10.1002/ett.4601
Rolando Herrero 1
Affiliation  

Wireless personal area networks (WPANs), as most IoT networking technologies, rely on constrained low power devices that support a trade-off between signal coverage and transmission rates. WPANs are characterized for medium to low transmission rates over low distances. The transmission rates, however, are high enough to support maximum transmission unit (MTU) sizes that are large enough to enable the transmission of IPv6 datagrams. One such WPAN technologies is associated with the IEEE 802.15.4 physical layer. Because IEEE 802.15.4 does not natively support IP encapsulation, an adaptation mechanism known as IPv6 over low-power wireless personal area networks (6LoWPAN) is used to this end. For large datagrams like those generated when transmitting speech frames, 6LoWPAN fragments them in order to comply with the 127-byte IEEE 802.15.4 MTU size. Fragmentation, however, aggravates the effects of network packet loss. This article explores this problem and attempts to find a mechanism that overcomes these limitations. Specifically, it introduces a hybrid error correction algorithm that dynamically adjusts the number of fragments that are transmitted in order to balance application layer loss and transmission rate.

中文翻译:

碎片化物联网媒体流中的混合纠错

与大多数物联网网络技术一样,无线个域网 (WPAN) 依赖于支持信号覆盖和传输速率之间权衡的受限低功耗设备。WPAN 的特点是在短距离上的中低传输速率。然而,传输速率足够高以支持最大传输单元 (MTU) 大小,该大小足够大以支持 IPv6 数据报的传输。一种这样的 WPAN 技术与 IEEE 802.15.4 物理层相关联。由于 IEEE 802.15.4 本身并不支持 IP 封装,因此为此使用了一种称为低功耗无线个人区域网络 (6LoWPAN) 上的 IPv6 的适配机制。对于传输语音帧时生成的大型数据报,6LoWPAN 将它们分段以符合 127 字节的 IEEE 802.15.4 MTU 大小。然而,碎片化加剧了网络数据包丢失的影响。本文探讨了这个问题,并试图找到一种克服这些限制的机制。具体来说,它引入了一种混合纠错算法,可以动态调整传输的分片数量,以平衡应用层丢失和传输速率。
更新日期:2022-07-15
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