NeTS: Small: Broadcast in Cognitive Radio Ad Hoc Networks

广播是自组织网络，特别是分布式多跳多信道网络中的一项重要操作。尽管在传统的单通道和多通道自组织网络中广播问题已经得到了广泛的研究，但在认知无线电自组织网络中的广播设计中存在着独特的挑战。在认知无线网络中，由于忽略了频谱可用性的动态特性，现有的方案会造成严重的性能下降。本课题的研究目标是设计、分析和评估无公共控制信道的多跳认知无线电自组织网络的新广播协议。广播设计以广播成功率最大化和平均广播延迟最小化为目标。该方法着重利用相邻节点的频谱相关性和不同节点的频谱分集设计新的信道交会、调度和避碰算法，以实现实际场景下的广播性能目标。该项目将为现有的认知无线电网络研究提供基础和补充解决方案。它还将有助于为认知无线电和动态频谱接入技术的众多应用产生创新技术。该项目为研究生和本科生提供了一个获得宝贵的教育培训和研究经验的绝佳机会。研究成果将在IEEE/ACM期刊和国际会议上发表。

Broadcast is an important operation in ad hoc networks, especially in distributed multi-hop multichannel networks. Although the broadcasting issue has been extensively investigated in traditional single channel and multi-channel ad hoc networks, there are unique challenges that are un-explored in the broadcast design in cognitive radio ad hoc networks. Existing schemes can have serious performance degradation due to the neglect of the dynamics in the spectrum availability in cognitive radio networks. The research objective of this project is to design, analyze, and evaluate new broadcast protocols for multi-hop cognitive radio ad hoc networks without a common control channel. The broadcast design is aimed at maximizing the broadcast success rate and minimizing the average broadcast delay simultaneously. The approach is focused on exploiting the spectrum correlations of neighboring nodes and the spectrum diversity of different nodes in designing new channel rendezvous, scheduling, and collision avoidance algorithms to achieve the broadcast performance goals in practical scenarios. This project will provide fundamental and complementary solutions to existing cognitive radio networking research on other network operations. It will also help generate innovative techniques to numerous applications of the cognitive radio and dynamic spectrum access technology. This project provides an excellent opportunity for graduate and undergraduate research students to gain valuable educational training and research experiences. The research results will be presented at IEEE/ACM journals and international conferences.