| 分层网络下行中断概率的闭式表达 |
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| 引用本文： | 张文健,田茂,何浩,沈祖康.分层网络下行中断概率的闭式表达[J].西安交通大学学报,2011,45(12):59-63,98. |
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| 作者姓名： | 张文健 田茂 何浩 沈祖康 |
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| 作者单位： | 1. 武汉大学电子信息学院,430079,武汉
2. 电信科学技术研究院,100191,北京 |
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| 基金项目： | 国家科技重大专项基金资助项目，北京市自然科学基金资助项目 |
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| 摘 要： | 针对用边界值形式表示的共信道干扰限制分层网络的下行中断概率不够精确的问题,采用随机几何理论建模网络结构,并在此基础上推导了每层下行中断概率的闭式表达式.首先构建了关于宏小区信号功率和毫微微小区聚合干扰功率的下行接收信干比函数,然后以聚合干扰功率为条件,根据宏小区信号功率的概率分布推导了接收信干比不高于门限值的概率,最后利用聚合干扰功率的概率分布计算条件中断概率的期望值,得到了中断概率闭式表达式.仿真结果表明:当毫微微小区基站发射功率降低3.16mW(小区平均数为100),或小区平均数减少20个(基站发射功率为100mW)时,能够分别使宏小区下行中断概率减小约20%或5%.
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| 关 键 词： | 分层网络 毫微微小区 共信道干扰 中断概率 |
Closed Expressions of Downlink Outage Probability in Tiered Networks |
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| ZHANG Wenjian,TIAN Mao,HE Hao,SHEN Zukang.Closed Expressions of Downlink Outage Probability in Tiered Networks[J].Journal of Xi'an Jiaotong University,2011,45(12):59-63,98. |
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| Authors: | ZHANG Wenjian TIAN Mao HE Hao SHEN Zukang |
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| Institution: | ZHANG Wenjian1,TIAN Mao1,HE Hao1,SHEN Zukang2(1.School of Electronic Information,Wuhan University,Wuhan 430079,China,2.China Academy of Telecommunication Technology,Beijing 100191,China) |
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| Abstract: | Since the downlink outage probability expressed with bound value is not precise enough in co-channel interference-limited tiered networks,the stochastic geometry theory is used to model network framework and closed-expressions of per-tier downlink outage probability are derived based on the framework.The received signal to interference ratio(SIR) is formulated as a function of macrocell signal power and femtocell aggregated interference power.Then the probability for received SIR less than a threshold is de... |
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| Keywords: | tiered networks femtocell co-channel interference outage probability |
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