论文标题
可靠的无线网络通过软源信息组合
Reliable Wireless Networking via Soft-Source Information Combining
论文作者
论文摘要
本文提出了一个多流网络范式，称为软源信息组合（SSIC），以支持具有超高可靠性要求的无线互联网应用程序（IoT）应用程序。对于SSIC网络，源源的SSIC调度程序可在多个流上进行数据包的重复项，这可以通过不同的物理无线网络建立。如果由于无线干扰或噪声无法解码流上的数据包，则解码器可提供数据包的软信息。然后，聚合器将重复项的软信息结合在一起，以提高可靠性。重要性是两个挑战：i）如何从不同的流中描述炒的软信息以启用正确的SSIC； ii）SSIC调度和聚合框架与商业网络接口卡（NIC）和TCP/IP网络兼容的构造。为了应对挑战，我们提出了：i）一种软描述（SD）方法，以最大程度地减少SSIC输出时的位误差率（BER）和数据包率（PER-ERROR速率（PER）； ii）SSIC网络体系结构易于在没有专门的NIC的当今TCP/IP网络上部署。为了证明和实验概念，我们在两个Wi-Fi的物理路径上实现了SSIC系统，以使所有传统TCP/IP应用程序都可以享受SSIC带来的无需修改的可靠性。我们测试床上的实验证实了SSIC在降低数据包输送失败率的有效性以及SSIC提供99.99％可靠的数据包输送以进行短期通信的可能性。
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.
