面向盲汇聚的无线网络抗干扰跳频技术研究

To overcome the negative effect on wireless network communications caused by dynamically changing environment and malicious jamming, neighboring network nodes can search interference-free frequency channels, which are available for both transmitters and receivers, in the real-time fashion by continuously hopping among their accessible ones until they rendezvous at a common channel at the same time and establish a communication link. In view of this, the present project will delve into the research on blind-rendezvous-oriented anti-jamming channel hopping technologies for multi-channel wireless networks under the distributed control subject to the constraint that each network node does not know such information of its neighbors as address label, channel hopping sequence, and time clock. By exploring the optimization problem for the trade-off among three performance parameters, i.e., rendezvous degree, time to rendezvous, and channel loading, of channel-hopping-based blind rendezvous, this project will make a breakthrough on the theoretical design and generation method of blind-rendezvous-oriented channel hopping systems subject to different numbers of node transceivers and different conditions of time synchronization among network nodes, disclose the general principle for optimizing the data transmission efficiency of multi-channel wireless networks under the condition that the network is equipped with a given anti-jamming ability, and perform software- and hardware-based simulation and verification to evaluate the performance of the proposed key technologies, algorithms and mechanisms. Hopefully, the final outcome of this project would serve as a solid theoretical basis for solving various key problems, such as adaption for environment changing, resistance for malicious jamming, and efficient management of spectrum resources, faced by multi-channel wireless networks under the distributed control.

为克服环境动态变化和恶意干扰对无线网络通信所造成的影响，相邻网络节点可以通过在多个可接入频段或信道上不断跳跃的方式，实时地寻找通信双方皆可用的无干扰信道，从而实现汇聚和建立通信连接。为此，本项目拟针对每个网络节点不具备邻居节点的地址编号、跳频序列和时钟等信息的限制条件，深入研究适用于分布式控制多信道无线网络的面向盲汇聚的抗干扰跳频技术。在对汇聚度、汇聚时间间隔和信道负载等跳频盲汇聚性能参数的折中优化问题进行探索的基础上，本项目将突破适用于不同数量的网络节点收发信机配置和不同的网络节点时钟同步条件的盲汇聚跳频系统的设计理论和生成算法，揭示在满足一定的网络抗干扰能力的前提下优化多信道无线网络数据传输效率的一般性规律，并针对所提出的关键技术、算法和机制执行基于软件和硬件的仿真验证和性能评估，最终为解决分布式控制下无线组网通信所面临的环境适变、抗恶意干扰和频谱资源高效管控等关键性问题奠定理论基础。

为克服环境动态变化和恶意干扰对无线网络通信所造成的影响，相邻网络节点可以通过在多个可接入频段或信道上不断跳跃的方式，实时地寻找通信双方皆可用的无干扰信道，从而实现汇聚和建立通信连接。为此，本项目针对每个网络节点不具备邻居节点的地址编号、跳频序列和时钟等信息的限制条件，深入研究了适用于分布式控制多信道无线网络的面向盲汇聚的抗干扰跳频技术。在对汇聚度（即DoR）、汇聚时间间隔（即MTTR、ATTR和MCTTR）和信道负载（即CL）等跳频盲汇聚性能参数的折中优化问题进行探索的基础上，本项目突破了单收发信机时钟同步、单收发信机时钟异步、多收发信机时钟同步、以及多收发信机时钟异步等四种盲汇聚跳频系统的设计理论和生成算法，推导出了具备MTTR=ATTR=1的异步跳频系统需要为每个网络节点配置的收发信机个数的理论下界值和多天线盲汇聚跳频系统的MCTTR理论下界值，在降低盲汇聚跳频系统所需硬件复杂度的基础上有效提升了基于跳频盲汇聚方式的控制信息交互性能。特别地，本项目提出的多收发信机时钟同步/异步跳频系统在学术界第一次同时实现了任意整数值的汇聚度DoR和达到MTTR和ATTR的理论最小值1。基于软件的仿真对比也显示，所提的各种盲汇聚跳频系统能获得优于现有同类型跳频系统的无线网络平均传输吞吐量和时延。.目前，项目组已将上述主要研究成果发表为2篇学术期刊论文和3篇学术会议论文（包括2篇JCR二区的SCI检索论文和3篇EI检索论文），获得了3项美国发明专利和8项中国发明专利的授权，以及申请了2项美国发明专利和2项中国发明专利。此外，项目组还有3篇已投出的国际期刊论文正在接受评审。与此同时，本项目负责人谭雪松老师也先后3次参加了IEEE ICC、Globecom和VTC Fall等无线通信领域的国际学术会议，并在四川成都举行的International Conference on Math in IT国际会议和上海科技大学信息科学与技术学院先后两次做了题为Anti-jamming blind rendezvous in wireless communications的学术报告。在后续的研究过程中，项目组将继续推进专利成果的转化和应用以及在审学术论文的后续发表工作。