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arXiv 2204.04055cs.NI
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基于软源信息融合的可靠无线组网

Reliable Wireless Networking via Soft-Source Information Combining

Lihao Zhang, Soung Chang Liew

摘要:

本文提出了一种多流网络范式,称为软源信息组合(SSIC),以支持无线物联网(IoT)应用的超可靠性要求。对于SSIC联网,源处的SSIC分派器在多个流上分派分组的副本,所述多个流可以在不同的物理无线网络上建立。如果流上的分组由于无线干扰或噪声而不能被解码,则解码器使分组的软信息可用。然后,聚合器组合重复的软信息以提高可靠性。重要的是两个挑战:i)如何解扰来自不同流的加扰的软信息以实现正确的SSIC; ii)构建与商业网络接口卡(NIC)和TCP/IP网络兼容的SSIC调度和聚合框架。为了解决这些挑战,我们提出:i)软解扰(SD)方法,以最小化SSIC的输出处的比特出错率(BER)和分组出错率(PER); ii)SSIC网络架构,其可容易地部署在当今的TCP/IP网络上而无需专门的解扰器。为了概念验证和实验,我们在两个Wi-Fi物理路径上实现了SSIC系统,所有传统TCP/IP应用程序都可以享受SSIC带来的可靠性而无需修改。在我们的测试平台上的实验证实了SSIC在降低数据包传输失败率方面的有效性,以及SSIC在短距离通信中提供99.99%可靠数据包传输的可能性。

英文摘要:

This paper puts forth a multi-stream networking paradigm, referred to as soft-source-information-combining (SSIC), to support wireless Internet of Things (IoT) applications with ultra-reliability requirements. For SSIC networking, an SSIC dispatcher at the source dispatches duplicates of packets over multiple streams, which may be established over different physical wireless networks. If a packet on a stream cannot be decoded due to wireless interference or noise, the decoder makes available the packet's soft information. An aggregator then combines the soft information of the duplicates to boost reliability. Of importance are two challenges: i) how to descramble the scrambled soft information from different streams to enable correct SSIC; ii) the construct of an SSIC dispatching and aggregation framework compatible with commercial network interface cards (NICs) and TCP/IP networks. To address the challenges, we put forth: i) a soft descrambling (SD) method to minimize the bit-error rate (BER) and packet-error rate (PER) at the SSIC's output; ii) an SSIC networking architecture readily deployable over today's TCP/IP networks without specialized NICs. For concept proving and experimentation, we realized an SSIC system over two Wi-Fi's physical paths in such a way that all legacy TCP/IP applications can enjoy the reliability brought forth by SSIC without modification. Experiments over our testbed corroborate the effectiveness of SSIC in lowering the packet delivery failure rate and the possibility of SSIC in providing 99.99% reliable packet delivery for short-range communication.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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