DYNAMIC FREQUENCY HOPPING VS. NONHOPPING IN IEEE 802.22 SYSTEMS
IEEE 802.22 is the first worldwide wireless standard based on Cognitive Radio (CR) for Wireless Regional Area Networks (WRAN). Usually, Secondary Users (SUs) have to be interrupted periodically for spectrum sensing so as to avoid interference to Primary Users (PUs) operating in the licensed bands. Such interruptions of data transmission, however, impair the Quality of Service (QoS) of SUs. Dynamic Frequency Hopping (DFH) has been proposed for IEEE 802.22 system. In DFH, data transmission is performed in parallel with spectrum sensing without interruptions. In this paper, we compare this hopping mode with non-hopping one by computer simulation, the results show that although hopping mode requires a little more channels, it can reduce the collision with PUs and achieve higher ratio of valid delivery and higher throughput, thus provide enhanced QoS for SUs.
Cognitive Radio IEEE 802.22 Dynamic Frequency Hopping Primary User Secondary User
Jing Tong Huarui Wu Changchuan Yin Yan Ma Jianfeng Li
Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of Po National Engineering Research Center for Information Technology in Agriculture, the Ministry of Agri Research Institute of Networking Technology, Beijing University of Posts & Telecommunications, Beiji
国际会议
北京
英文
95-99
2009-11-06（万方平台首次上网日期，不代表论文的发表时间）