[1] Zhang Lei, Song Tiecheng, Wu Ming, Hu Jing, et al. Analysis of cumulative handoff delayfor graded secondary users in cognitive radio networks [J]. Journal of Southeast University (English Edition), 2013, 29 (2): 111-117. [doi:10.3969/j.issn.1003-7985.2013.02.001]
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Analysis of cumulative handoff delayfor graded secondary users in cognitive radio networks(
)
认知无线网络中分级下的从用户累积切换延时分析
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 29
- Issue:
- 2013 2
- Page:
- 111-117
- Research Field:
- Information and Communication Engineering
- Publishing date:
- 2013-06-20
Info
- Title:
- Analysis of cumulative handoff delayfor graded secondary users in cognitive radio networks
- 认知无线网络中分级下的从用户累积切换延时分析
- Author(s):
- Zhang Lei, Song Tiecheng, Wu Ming, Hu Jing
- National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
- Keywords:
- cognitive radio network; graded secondary users; multiple spectrum handoffs; cumulative handoff delay; admission access region
- PACS:
- TN915
- DOI:
- 10.3969/j.issn.1003-7985.2013.02.001
- Abstract:
- According to the fact that the secondary users’ delay requirements for data transmission are not unitary in cognitive radio networks, the secondary users are divided into two classes, denoted by SU1 and SU2, respectively. It is assumed that SU1 has a higher priority to occupy the primary users’ unutilized channels than SU2. A preemptive resume priority M/G/1 queuing network is used to model the multiple spectrum handoffs processing. By using a state transition probability matrix and a cost matrix, the average cumulative delays of SU1 and SU2 are calculated, respectively. Numerical results show that the more the primary user’s traffic load, the more rapidly the SU2’s cumulative handoff delay grows. Compared with the networks where secondary users are unitary, the lower the SU1’s arrival rate, the more obviously both SU1’s and SU2’s handoff delays decrease. The admission access regions limited by the maximum tolerable delay can also facilitate the design of admission control rules for graded secondary users.
- 根据认知无线网络中从用户数据传输延时需求的不同, 将从用户分成SU1和SU2两类.并假设SU1比SU2优先使用主用户的空闲频谱.利用基于优先级的M/G/1排队网络, 对多重频谱切换过程进行建模.根据状态转移概率和转移消耗矩阵, 分别计算出2类从用户的平均累积延时.数值结果表明, 主用户业务负载越大, SU2的累积切换延时增加得越快.与从用户不分级的认知网络比较表明, 分级下的SU1到达率越低, 2类从用户的累积切换延时减少得越明显.对2类从用户在最大可容忍延时下的允许接入区域的分析, 可较好地适用于分级下的从用户接入控制方案的设计.
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Memo
- Memo:
-
Biographies: Zhang Lei(1986—), male, graduate; Song Tiecheng(corresponding author), male, doctor, professor, songtc@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No.60972026, 61271207), the National Science and Technology Major Project(No.2010ZX03006-002-01), the Specialized Research Fund for the Doctoral Program of Higher Education(No.20090092110009), the Specialized Development Foundation for the Achievement Transformation of Jiangsu Province(No.BA2010023).
Citation: Zhang Lei, Song Tiecheng, Wu Ming, et al. Analysis of cumulative handoff delay for graded secondary users in cognitive radio networks[J].Journal of Southeast University(English Edition), 2013, 29(2):111-117.[doi:10.3969/j.issn.1003-7985.2013.02.001]