摘要
IEEE 802.11和IEEE 802.22均支持高速数据业务,且后者具认知无线电功能。文章分析支持上述2种标准的异构网移动认知终端的能耗问题。以无线局域网(Wireless local area networks,WLAN)作为优先接入网络,无线区域网络(Wireless regional area network,WRAN)作为备用业务网络,建立马尔科夫状态转移图,得到该环境中终端能耗与其影响因素之间的定量关系。建立蒙特卡洛仿真模型,对上述定量关系加以验证,仿真结果表明:数据业务持续时间越低于系统稳定条件的门限,仿真值与理论值吻合得越好。
Both IEEE 802.11 and IEEE 802.22 support high-speeded data service while the latter supports cognitive radio technology. The energy consumption of the mobile terminals in heterogeneous network environ- ment supporting the two standards above is investigated. Preferring WLAN to WRAN which acts as a standby, a state transition diagram is formulated based on Markov chain, leading to the quantitative relationship between energy consumption of the terminal and influencing factors in this environment, while a Monte Carlo simulation model is formed to testify the above quantitative relations. The simulation results show that a duration of data services, which is less than the threshold of the system stability conditions, will result in a better coincidence with the theoretical value.
出处
《信息化研究》
2012年第5期45-50,共6页
INFORMATIZATION RESEARCH
基金
2011江苏省自然科学基金项目(BK2011837)
关键词
认知无线电
异构网
无线局域网
无线区域网络
能耗
马尔科夫链
cognitive radio
heterogeneous network
wireless local area networks
wireless regional area network
energy consumption, Markov chain
