基于跨技术通信的异构无线网数据传输关键技术研究

With the explosion of mobile devices, the performance of wireless data transmission is severely restricted by the large number of cross-technology interference in Heterogeneous Wireless Networks where multiple communication technologies coexist. In recent years, the principle of cross-technology communication, which has made important breakthroughs, provides new ideas for mitigating the above bottleneck problem. This project focuses on the principle of cross-technology communication, and study the three key points in the process of data transmission in HWNs including interfered data recovery, media access control and data aggregation routing. Specially, the features of physical signals and transmitted data are analyzed, and a cross-layer optimization method of interfered data recovery with precision constrained is proposed to improve the efficiency of wireless communication data transmission under interference. Based on the cross-technology communication, the active cooperation among different communication technologies is established, and a media access control method with guaranteed delay is proposed to achieve efficient allocation and scheduling of channel resources in wireless networks. On this basis, a heterogeneous dynamic network topology model is constructed, and a efficient data aggregation routing scheduling with QoS constraints is realized by utilizing the details of the links. The corresponding evaluation to validate the feasibility and performance of the above scheme are made based on the prototype system of heterogeneous wireless networks. This project provides new concepts, principles and methods for optimal scheduling and management of wireless resources in heterogeneous wireless networks, and promotes the development of cross-technology communication in the field of wireless communication.

随着移动终端设备的爆炸式增长，多种通信技术共存的异构无线网中跨技术干扰大量出现，严重制约无线数据传输性能。近年来取得重要突破的跨技术通信理论为解决上述瓶颈问题提供了新思路。本项目拟围绕跨技术通信理论，对异构无线网数据传输中的干扰数据包恢复、媒介访问控制、数据聚集路由三个关键环节展开研究。分析物理信号和传输数据的特征，提出跨层优化的精度可控干扰数据包恢复方法，提高干扰下的无线通信数据传输率；利用跨技术通信理论，建立不同通信技术间的主动合作，提出时延可保证的媒介访问控制方法，实现无线网络信道资源高效分配调度；在此基础上，构建异构动态网络拓扑模型，利用链路细节信息，实现满足QoS约束的高效数据聚集路由规划，并在异构无线网原型系统上分析上述方案的可行性和性能。本项目为异构无线网的无线资源优化调度和管理提供新概念、新原理和新方法，同时推进跨技术通信理论在无线通信领域的发展。

随着无线设备的日益普及，越来越多的物联网设备接入网络，多种通信技术共存的异构无线网络应运而生。异构无线网络中的跨技术干扰对网络性能有很大影响。本项目基于跨技术通信理论对异构无线网中精度可控的干扰数据包恢复、提供时延保障的媒介访问控制、满足QoS约束的数据聚集路由等关键科学问题进行深入系统地研究。针对跨技术通信中吞吐量低问题，设计并提出了基于ZigBee码片级侧信道的跨技术通信框架；针对跨技术干扰严重的问题，提出了异构无线网络中的干扰数据包恢复技术；针对跨技术通信的协作，提出了跨技术通信中的自适应速率调节技术。本项目执行期间取得了良好的进展，多个研究成果在国内外高水平学术会议和期刊发表。本项目通过深入分析异构无线网络的网络通信特性，全面、精确地优化异构无线网络的数据传输，为物联网的发展奠定坚实的基础。