| 摘要: |
| 构建认知无线电网络是解决频谱资源日趋紧张问题的根本途径。为实现无干扰的伺机
频谱共享，认知无线电网络的链路层不仅需要提供传统的数据传输服务，还必须支持一套与
频谱非均匀特性相适应的新功能。对这些新功能所需的关键技术进行了归纳，分别从协
作感知、感知机制优化、动态频谱接入、动态频谱分配、跨层设计及安全机制等6个方面进
行了探讨，重点对这些关键技术的最新研究进展进行了总结和分析，并讨论了下一步的主要
研究方向。 |
| 关键词: 认知无线电网络 链路层 协作感知 感知机制 动态频谱接入 频谱分配 跨层设计 |
| DOI：10.3969/j.issn.1001-893X. |
|
| 基金项目:国家高技术研究发展计划(863计划)项目(2009AAJ208, 2009AAJ116) |
|
| Survey on Linker Layer Key Technologies in Cognitive Radio Networks |
| LIU Quan,GAO Jun,GUAN Jian-xin,GUO Yun-wei |
| (College of Communication Engineering, Naval University of Engineering, Wuhan 430033, China) |
| Abstract: |
| Cognitive Radio Network (CRN) has emerged as a promising paradigm to
solve the increasingly serious spectrum scarcity problem. To share the existing
licensed spectrum opportunistically without interference, the linker layer of CR
N, besides providing the traditional services for data transmission, is required
to support an entirely new set of functionalities. A survey on the key technolo
gies required by these functionalities is given in this paper, with focus on six
aspects in particular, including cooperative sensing, sensing mechanism optimiz
ation, dynamic spectrum access, dynamic spectrum allocation, crosslayer design
, security design. Based on the summaries and analysis of the latest development
, directions of the future work are investigated. |
| Key words: cognitive radio network linker layer cooperative sensing sensing mechanism dynamic spectrum access spectrum allocation cross layer design |
《电讯技术》编辑部 